51 results about "Terbium" patented technology

The invention discloses a method for improving performance of rare earth permanent magnet sintered neodymium iron boron grain boundary diffusion, and belongs to the technical field of rare earth permanent magnet materials. The method comprises the steps that a low-melting-point metal layer and a diffusion layer containing heavy rare earth elements are sequentially formed on the surface of a clean sintered neodymium-iron-boron magnet, and then vacuum diffusion heat treatment and tempering treatment are conducted. Wherein the low-melting-point metal layer comprises at least one of copper, aluminum, gallium and tin or an alloy of the copper, the aluminum, the gallium and the tin; the heavy rare earth element comprises at least one of dysprosium, terbium, holmium and gadolinium. The low-melting-point metal layer is preferentially diffused and wets the grain boundary in the heat treatment process, heavy rare earth elements are promoted to be deeply and uniformly diffused towards the interior of the magnet along the grain boundary, so that a heavy rare earth-rich shell layer is formed outside main phase grains of the magnet, and the intrinsic coercive force is improved; meanwhile, the low-melting-point metal forms a strengthening phase at the grain boundary, the brittleness of the magnet after diffusion is improved, the surface corrosion phenomenon is restrained, and collaborative optimization of the comprehensive performance of the magnet is achieved.

The invention discloses a neodymium-iron-gallium double-alloy heavy-rare-earth-free 54H sintered neodymium-iron-boron magnet and a preparation method thereof, and relates to the technical field of neodymium-iron-boron magnet preparation, and the neodymium-iron-gallium double-alloy heavy-rare-earth-free 54H sintered neodymium-iron-boron magnet comprises the following preparation raw materials: 170-175 kg of PrNd (praseodymium-neodymium alloy), 25-30 kg of BFe (iron white copper), 1-5 kg of Co (cobalt), 0.1-2 kg of Cu (copper), 1-5 kg of Zr (zirconium), 0.1-1 kg of Ga (gallium) and 380-420 kg of Fe (iron). According to the neodymium-iron-gallium double-alloy heavy-rare-earth-free 54H sintered neodymium-iron-boron magnet and the preparation method thereof, the 54H sintered neodymium-iron-boron magnet is prepared through a double-alloy technology with neodymium, iron and gallium as auxiliary alloy without adding dysprosium, terbium and other scarce type heavy rare earth elements, and performance optimization and cost optimization of the neodymium-iron-gallium double-alloy heavy-rare-earth-free 54H sintered neodymium-iron-boron magnet are achieved.

The invention relates to a novel functional material for X-ray protection, in particular to a liquid metal flexible shielding material and a preparation method and application thereof. The material comprises liquid metal and solid metal, the liquid metal serves as a solvent to be filled in gaps of the solid metal, the liquid metal is gallium, gallium indium, gallium indium tin, gallium indium tin zinc or mercury, and the solid metal is selected from one or more of indium, tin, gold, platinum, iridium, zirconium, niobium, molybdenum, ruthenium, osmium, rhenium, rhodium, tungsten, antimony, palladium, tantalum, hafnium, lutetium, lead, ytterbium, thulium, bismuth, silver, erbium, holmium, dysprosium, terbium, gadolinium, samarium, neodymium, lanthanum, praseodymium, cerium and europium. On the basis of compounding of the liquid metal solvent and the solid metal solute based on the liquid metal combinatology, the liquid metal and the solid metal are jointly used for protecting X-ray radiation, the comprehensive performance of X-ray protection is improved, and meanwhile the variety and number range of selectable metal elements is widened.

The invention discloses a multicolor stress luminescent material for handwriting anti-counterfeiting and a preparation method thereof, the chemical general formula is Lu3-xAl2Ga3O12: xTb < 3 + >, 0.25% < = x < = 3.0%; the crystal structure is an Ia-3d cubic system, and the active ion is Tb < 3 + >. The preparation method comprises the following steps: weighing a lutetium-containing compound raw material, an aluminum-containing compound raw material, a gallium-containing compound raw material and a terbium-containing compound raw material, grinding and uniformly mixing to obtain a mixture, presintering, heating and calcining, cooling to room temperature, and grinding to obtain the terbium ion-doped multicolor stress luminescent material. The terbium ion-doped multicolor stress luminescent material disclosed by the invention has good stress luminescence self-recovery performance, shows different responses of energy level transition to stress in a visible light range, and is adjustable in color. The material has a low-threshold excitation characteristic, can provide multicolor stress luminescence response, and meets multicolor anti-counterfeiting requirements under different stress conditions.

The invention relates to preparation and application of a ruthenium-functionalized terbium-based metal organic framework fluorescence sensing material for uric acid detection. The preparation method comprises the following steps: S1, selecting raw materials; s2, dissolving pyrazinetetracarboxylic acid in secondary water, and stirring; s3, adding the solution obtained in S2 into a methanol solution of terbium nitrate, and stirring; s4, adding the solution obtained in S3 into a KOH solution, and stirring; s5, aging, alternately washing with distilled water and ethanol, centrifugally collecting white precipitate, and drying to obtain a white rare earth metal organic framework material; s6, dispersing the sample in an ethanol solution of Ru (bpy) 3 < 2 + >, and stirring; and S7, washing the solution obtained in the step S6 with ethanol, performing centrifugal separation to obtain a precipitate, and drying to obtain the ruthenium-functionalized terbium-based metal organic framework material. And S8, detecting uric acid in urine by using the obtained ruthenium functionalized terbium-based metal organic framework material. The ruthenium-functionalized terbium-based metal organic framework can be used as a ratio type fluorescent probe, and uric acid in urine can be identified and detected more sensitively and accurately.

The inventors have developed technology to improve the generation of daughter isotopes for clinical treatments. The technology includes systems and methods for using a liquid target to deliver parent isotopes to a reactor for neutron bombardment and subsequently separating desired daughter isotopes from the liquid target. According to an aspect of the technology described herein, a method of obtaining desired daughter isotopes comprises pumping a liquid target solution comprising a parent isotope through a fluid path that includes a first portion that passes through a fission reactor, a second portion that passes through a pump, and a third portion that passes through an isotope capture device.

The invention discloses a high-strength and high-toughness ADC12 cast aluminum alloy and a preparation method thereof, and belongs to the technical field of aluminum alloy preparation. The ADC12 cast aluminum alloy comprises the following chemical components in percentage by weight: 9.6%-12.0% of Si, less than or equal to 1.3% of Fe, 1.5%-2.5% of Cu, less than or equal to 0.5% of Mn, less than or equal to 0.3% of Mg, less than or equal to 0.5% of Ni, less than or equal to 1.0% of Zn, less than or equal to 0.2% of Sn, 0.1%-0.3% of Tb and the balance of aluminum and inevitable impurity elements. According to the ADC12 cast aluminum alloy, the content of a copper element is reduced, and meanwhile, a trace amount of rare earth terbium element is added to refine a structure, so that the strength and the toughness are improved, and the strength reduction caused by the reduction of the copper element is made up. Meanwhile, artificial aging treatment is provided, and the strength is further improved by separating out a secondary strengthening phase, so that the ADC12 material which is low in cost, high in strength and high in toughness is developed, and the high-strength requirement under the extreme condition is met.

To provide a multilayer electronic component that meets the target TCC characteristics and offers excellent reliability even when high voltage is applied. [Solution] The stacked electronic component includes a body containing a dielectric layer and internal electrodes, and external electrodes disposed on the body. The dielectric layer contains a plurality of dielectric crystal grains, and at least one of the plurality of dielectric crystal grains has a core-double shell structure including a core 11, a first shell 12 surrounding at least a part of the core, and a second shell 13 surrounding at least a part of the first shell. The first shell and the second shell contain rare earth elements, including at least one of gadolinium (Gd), yttrium (Y), dysprosium (Dy), and terbium (Tb). The average atomic percentage of rare earth elements in the first shell is higher than the average atomic percentage of rare earth elements in the second shell, and the average atomic percentage of rare earth elements in the first shell is 4.0 at% or more and 6.0 at% or less.

This invention discloses a method for preparing high-purity terbium-iron alloy, utilizing ferric fluoride as a chemical decalcification agent in the refining stage. Compared with existing technologies that rely solely on high-temperature volatilization and physical adsorption for calcium removal, this method provides a clear chemical driving force, converting calcium dissolved in the alloy melt into an insoluble calcium fluoride slag phase through a displacement reaction, thereby achieving efficient calcium removal. This invention can reduce the calcium content in terbium-iron alloy from 0.011-0.015% in traditional processes to 0.002-0.004%, a reduction of 70-85%. This method requires no special equipment; only the addition of ferric fluoride in the refining stage is needed, resulting in low process modification costs and good industrial applicability.

The application provides a terbium-free sintered neodymium-iron-boron permanent magnet and a preparation method thereof, and belongs to the technical field of permanent magnets.The terbium-free sintered neodymium-iron-boron permanent magnet is obtained by mixing a base alloy cast piece with a specific composition, a dysprosium alloy cast piece with a specific composition and dysprosium oxide, and sequentially performing hydrogen crushing, airflow milling, orientation forming, sintering and tempering treatment.The dysprosium alloy cast piece and the dysprosium oxide are used as auxiliary alloys, the microstructure of the base alloy cast piece can be controlled through the hydrogen crushing process, the airflow milling process and the sintering process and the tempering treatment process, and finally, the terbium-free high-performance neodymium-iron-boron permanent magnet is prepared, the scarce rare earth resource terbium is saved to a certain extent, the production cost is reduced, and the balanced utilization of the rare earth resource is promoted.

This invention relates to a scandium-terbium-gallium garnet magneto-optical crystal without radial stripes and its preparation method. The Tb3Sc crystal was grown using the Czochralski method. x Ga 5‑x O 12 The magneto-optical crystal (where x = 0.05–0.3) belongs to the cubic crystal system and has the space group Ia–3d. This method utilizes a small amount of Sc... 3+ Partial Ga doping 3+ This helps suppress the formation of spiral dislocation-related defects, enabling the growth of high-quality terbium gallium garnet magneto-optical crystals without radial stripes. Low-concentration Sc 3+ The doping strategy has shown excellent results in addressing the radial stripe defect in TGG crystals and improving their key performance characteristics, providing a practical new approach for the fabrication of core materials for magneto-optical devices. This crystal material is expected to find practical applications in magneto-optical devices such as magneto-optical isolators, magneto-optical circulators, and magneto-optical modulators.

The application relates to a thulium-terbium co-doped calcium yttrium aluminate near-infrared waveband laser crystal and a preparation method and application thereof. x Tb y CaY 1‑x‑y AlO4, wherein the value range of x is 0.001-0.05, the value range of y is 0.0001-0.002, the space group is I4 / mmm, and the crystal is tetragonal. Compared with the prior art, the laser crystal can efficiently realize near-infrared waveband laser output near 1.5 microns and can be applied to the fields of medical treatment, military affairs, communication detection and the like.

The invention discloses a terbium gallium garnet crystal and a growth method thereof, and relates to the technical field of crystal preparation. The growth method of the terbium gallium garnet crystal comprises the following steps: respectively weighing terbium oxide and gallium oxide according to a molar ratio of 1: (2-2.4), and mixing to form a powdery mixture; heating the powdery mixture for pre-synthesis to obtain a blocky mixture; and taking the blocky mixture as a substrate, taking terbium fluoride and / or gallium fluoride as an inhibitor, and putting the blocky mixture and the inhibitor into a pulling furnace for pulling growth to generate the terbium gallium garnet crystal. According to the terbium gallium garnet crystal and the growth method thereof, the crystal quality of the terbium gallium garnet crystal can be improved.

The present application relates to a method for improving the three-point bending strength of neodymium-iron-boron by grain boundary diffusion. The method is as follows: polishing and cutting the surface of a neodymium-iron-boron magnet blank, then ultrasonic cleaning in a degreasing agent solution, followed by acid pickling, water washing and drying to obtain a dry neodymium-iron-boron base material; placing the neodymium-iron-boron base material in a copper plating solution and applying current to carry out copper plating to obtain a copper-coated neodymium-iron-boron base material; physically vapor depositing a heavy rare earth terbium film on the surface of the copper-coated neodymium-iron-boron base material in a direction parallel to the easy magnetization axis to obtain a terbium-copper-coated neodymium-iron-boron base material; and then sequentially carrying out heat treatment and tempering treatment under vacuum conditions. The present application coats a copper film on the neodymium-iron-boron base material by electroplating, then physically vapor deposits a heavy rare earth element terbium on the copper-coated neodymium-iron-boron base material in a direction parallel to the easy magnetization axis, carries out grain boundary diffusion heat treatment, and obtains excellent comprehensive magnetic properties while improving the three-point bending strength of neodymium-iron-boron.

The invention belongs to the technical field of material science, and particularly relates to a rare-earth-based fluorine cluster for magnetic resonance imaging and cell imaging and a preparation method and application of the rare-earth-based fluorine cluster. The molecular formula of the rare earth based fluorine cluster is [(RE24 (3-F) 22 (OH) 6 (tBuCOO) 21 (Hdmpa) 11 (H2dmpa) 7CH3OH CH3CN], RE is a rare earth element, BuCOOH is trimethyl acetic acid, H3dmpa is a 2, 2-bis (hydroxymethyl) propionic acid ligand, and OH and 3-F are in a bridging mode of fluorine ions. The rare earth-based fluorine cluster provided by the invention has excellent thermal stability and solution stability, and the gadolinium-based cluster compound shows longitudinal relaxation efficiency superior to that of a commercial contrast agent Gd-DTPA; the material has good corrosion resistance, is easy to process and form, can stably exist at 300 DEG C due to good thermal stability, and the introduction of fluorine ions in the structure can enhance the quantum yield of europium and terbium group clusters.

The application provides a kind of porous crystalline material and its preparation method and application as variable temperature luminescent material, belong to metal organic framework material technical field.The molecular formula is: C 25 H 21 NO8PLn, wherein Ln is europium ion or terbium ion.The material contains dynamic molecular rotor module ligand H3TPO, and the energy level of the lowest excited singlet state (S1) and triplet state (T1) can be elastically adjusted with temperature change, and this characteristic makes isomorphic materials Eu-PO and Tb-PO exhibit rare and completely opposite thermoluminescence behavior.The application not only provides a new idea for regulating the energy level of dynamic antenna to construct artificial intelligent luminescent material, but also opens up a new direction for developing high-performance X-ray scintillators based on Ln-MOFs.

The invention discloses a dehydration device for preparing terbium fluoride, and belongs to the technical field of fluorination dehydration. Comprising a barrel body, a stirring assembly is arranged in the barrel body, the stirring assembly comprises a plurality of spiral ring plates which are linearly and uniformly distributed and movably installed on the barrel body, the outer edges of the spiral ring plates make contact with the inner wall of the barrel body, and auxiliary shafts are fixedly connected to the middles of the spiral ring plates; a screening plate is fixedly connected between the head end and the outer end of the spiral ring plate, and a plurality of screening holes are evenly formed in the surface of the screening plate. Through the multiple spiral ring plates connected in series through the auxiliary shafts and the screening plates with the screening holes arranged between the plates, stirring of materials is achieved in the rotating process, raw materials can be evenly heated, meanwhile, the materials are continuously dispersed and thrown in the moving process by means of the rotation of the screening plates and the effect of the screening holes, the contact area of the materials and gas is remarkably increased, and the gas-liquid separation efficiency is improved. The dehydration efficiency is improved.

This invention discloses a metal-organic framework (MOF) material for detecting copper ions, its preparation method, and its application, relating to the field of nanomaterials technology. The MOF material, for the first time, uses 3-(pyridin-4-yl)benzoic acid as an organic ligand to react with terbium ions (Tb). 3+ Stable three-dimensional porous Tb-PBA MOFs materials were formed through solvothermal coordination. The chemical structure and optical properties of the Tb-PBA MOFs materials were characterized using various techniques. After a series of condition optimizations, the Tb-PBA MOFs could be uniformly dispersed in water and emitted bright and stable green fluorescence. Testing showed that the Tb-PBA MOFs exhibited good adhesion to copper ions (Cu). 2+ This invention exhibits a remarkable fluorescence quenching response, demonstrating rapid, sensitive, and selective detection capabilities for copper ions. The preparation method is simple, the material exhibits good stability, and it has broad application prospects in environmental monitoring and biosensing.

This invention discloses a low-indium ceramic target, its preparation method, and its application. The low-indium ceramic target comprises the following components by mass percentage: indium oxide content of 50.2%–60.8%; zinc oxide content of 16.8%–25.3%; tin oxide content of 18.0%–28.3%; and metal oxide content of 0.10%–2.5%. The sum of the contents of all components is 100%. The metal oxide includes at least three of the following: praseodymium oxide, hafnium oxide, terbium oxide, dysprosium oxide, and cerium oxide. Increasing the density of the target and lowering the sintering temperature improves the mobility of the TCO thin film prepared from the low-indium ceramic target.

This invention discloses a vacuum induction melting apparatus and refining method for terbium metal refining, relating to the field of metal refining technology. It aims to solve the technical problem of low separation efficiency during the separation of terbium metal from calcium fluoride slag in the terbium metal refining process, which affects the purity and production efficiency of terbium metal refining. The apparatus includes a vacuum furnace body, inside which are arranged a tilting crucible and a dynamic separation component. The dynamic separation component includes a separation drum and multiple oscillating filter plates. The multiple oscillating filter plates are movably arranged in a circular array on the outer wall of the separation drum. Multiple perforated filter layers are arranged on the side wall of the separation drum. The oscillating filter plates can be held at an inclined angle to the side of the perforated filter layers, and can also merge with the perforated filter layers. This invention has the advantage of achieving rapid separation of terbium metal and calcium fluoride slag.

This invention discloses an apparatus and method for preparing a high specific activity Tb-161 solution, belonging to the field of radioisotope preparation technology. It includes: a shielded box and a target material processing system, a separation system, a radioactivity detection system, and a control system housed within the shielded box. The separation system is used to adsorb the target material solution, elute it with an organic carboxylic acid eluent, and process the obtained Tb-161-containing eluent to obtain a Tb-161-containing solution. The apparatus for preparing a high specific activity Tb-161 solution provided by this invention separates Tb-161 from irradiated Gd-160-enriched target material using ion chromatography, significantly improving the yield and specific activity of terbium-161 and simplifying the separation process. The constant column temperature during separation greatly reduces waste liquid volume, shortens separation time, and avoids the problem of insufficient terbium-161 specific activity caused by gadolinium tailing.

A cold storage material particle according to one embodiment comprises: at least one first element selected from the group consisting of yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu); nickel (Ni); at least one second element selected from the group consisting of silicon (Si) and germanium (Ge); a crystal phase of a SmNiGe3 type; and at least one of a CeNiSi2 type crystal phase and a CaF2 type crystal phase.

A terbium-based metal organic framework crystal material, a preparation method and application thereof belong to the technical field of metal organic framework materials and analysis and detection. The chemical formula of the terbium-based metal organic framework crystal material prepared by the present application is [Tb2(trzbi)2(NO3)2(H2O)] n , which is prepared by a solvothermal and microwave-assisted method. The asymmetric structure unit of the terbium-based metal organic framework crystal material is composed of two independent Tb 3+ ions, two dehydrogenated trzbi 2‑ ligands, two coordinated NO 3‑ ions and one coordinated H2O molecule; two adjacent Tb 3+ ions are connected by ligand carboxyl and coordinated nitrate ions to form a [Tb2(COO)2(NO3)2] binuclear secondary structure unit, and a three-dimensional framework is formed by ligand connection. The terbium-based metal organic framework crystal material has stable luminescence intensity in aqueous solutions with different pH values, and can realize high specificity fluorescence detection of tetracycline hydrochloride.

The invention relates to a rare earth terbium-based metal organic framework fluorescent probe, preparation and application of the rare earth terbium-based metal organic framework fluorescent probe in detection of ciprofloxacin in a water environment. The structural formula of the rare earth terbium-based metal organic framework fluorescent probe is [Tb2 (TFPA) 3 (Terpy) 2 (H2O) 3] n 2nEtOH, Tb < 3 + > serves as a rare earth sensitization luminescence center, tetrafluoroisophthalic acid (TFPA) and terpyridine (terpy) serve as mixed ligands, and the rare earth terbium-based metal organic framework fluorescent probe is synthesized in a mixed solvent of water and ethyl alcohol through a normal-temperature volatilization method. The preparation method is mild in condition and convenient to operate. The obtained Tb-MOF fluorescent probe shows high-selectivity fluorescence recognition capability on antibiotic ciprofloxacin (Cip), and has the advantages of high detection sensitivity (the detection limit is 26.17 nM), short response time (2 minutes), macroscopic fluorescence change and the like. The invention provides an effective means for rapid and high-sensitivity detection of ciprofloxacin in a water system.

The invention is applicable to the technical field of near-infrared luminescent materials, and provides lanthanide ion co-doped double perovskite nanocrystals and a preparation method and application thereof, and the preparation method comprises the following steps: taking cesium acetate, sodium acetate, terbium acetate, antimony acetate and lanthanide ion acetate containing Sm < 3 + >, Nd < 3 + > and Er < 3 + > according to a specific raw material ratio, additionally taking oleic acid and oleylamine, and adding the taken materials and octadecene into a reaction container; vacuumizing the container, filling nitrogen for gas washing, heating to a preset temperature, continuously vacuumizing, and stirring until the solution is clear; and heating the solution to 180 DEG C in an inert atmosphere, injecting trimethylchlorosilane, reacting for a preset time, rapidly cooling, centrifuging, dispersing the solvent, and drying to obtain the lanthanide ion co-doped double perovskite nanocrystal. The lead-free halogen double perovskite matrix has the advantages of low phonon energy, high stability and no toxicity, and can provide an ideal coordination field; after the three lanthanide ions are co-doped, the infrared emission spectrum of the nanocrystalline covers 850-1650nm, and the luminous efficiency is up to 70%.

The application discloses a rare earth doped double-color fluorescent material, a preparation method and application thereof, and has a chemical general formula of K3RESi6O 15 :xM, wherein 0.002<=x<=0.05; the RE is any one of praseodymium ions Pr 3+ , cerium ions Ce 3+ , terbium ions Tb 3+ ; the M is any one of samarium ions Sm 3+ , europium ions Eu 3+ , gadolinium ions Gd 3+ , terbium ions Tb 3+ , erbium ions Er 3+ , and the RE and the M are different rare earth ions. The rare earth element doped silicate inorganic fluorescent material has the ability of emitting light in multiple fluorescent light color domains (such as a red light region and a yellow-green light region) under different ultraviolet light excitation, and the fluorescent light emitting properties can be adjusted by changing the doped types and proportions of the rare earth elements to meet actual demands.

This invention discloses a neodymium-iron-gallium dual-alloy 54H sintered neodymium-iron-boron magnet and its preparation method, relating to the field of neodymium-iron-boron magnet preparation technology. The preparation includes the following raw materials: 170-175 kg of PrNd (praseodymium-neodymium alloy), 25-30 kg of BFe (ferrocopper), 1-5 kg ​​of Co (cobalt), 0.1-2 kg of Cu (copper), 1-5 kg ​​of Zr (zirconium), 0.1-1 kg of Ga (gallium), and 380-420 kg of Fe (iron). This neodymium-iron-gallium dual-alloy 54H sintered neodymium-iron-boron magnet and its preparation method utilize a dual-alloy process with neodymium-iron-gallium as an auxiliary alloy, without adding scarce heavy rare-earth elements such as dysprosium and terbium, to prepare 54H sintered neodymium-iron-boron magnets, achieving optimized performance and cost of neodymium-iron-boron magnets.

This invention discloses a transition metal-rare earth composite two-component oxygen reduction electrocatalyst and its preparation method. The substrate material of the catalyst is two-dimensional nitrogen-doped carbon nanosheets, on which cobalt ions and terbium oxide are loaded. Cobalt is atomically positioned and anchored by lattice oxygen on the surface of terbium oxide, establishing a localized terbium-oxygen-cobalt structural unit with gradient orbital coupling. The preparation method is as follows: (1) Melamine and sucrose are dissolved in water, and then cobalt salt and terbium salt are added to form a mixed solution; (2) The mixed solution prepared in step (1) is subjected to a hydrothermal reaction; (3) The product of step (2) is calcined at high temperature under inert gas protection to obtain the transition metal-rare earth composite two-component oxygen reduction electrocatalyst. The catalyst exhibits excellent oxygen reduction catalytic activity by combining terbium oxide and cobalt to form an atomically supported cobalt-terbium oxide complex.

The application discloses a high-sensitivity special-shaped core magnetic sensitive optical fiber and belongs to the technical field of optical fibers. The special-shaped core magnetic sensitive optical fiber comprises a cladding and a special-shaped core embedded in the cladding. The cross section of the special-shaped core is a chord-shaped structure composed of a circular arc and a chord, and the radian of the circular arc is greater than pi. The cladding is an air layer except the special-shaped core. The material of the special-shaped core is a rare earth metal element terbium doped magneto-optical glass. The special-shaped core magnetic sensitive optical fiber can generate a significant non-reciprocal magneto-optical effect under the action of a magnetic field, can be used for high-sensitivity magnetic field detection, can realize high-sensitivity, high-stability, miniaturization and high-bandwidth optical fiber magnetic field sensing, and has great significance in the development in the field of magnetic field measurement.