31results about How to "Increased structural distortion" patented technology

The invention provides a laminated BiFe(0.97-x)Mn0.03TMxO3 / CoFe2O4 multiferroic composite film and a preparation method thereof. The composite film comprises a BiFe(0.97-x)Mn0.03TMxO3 / CoFe2O4 crystallized film and a CoFe2O4 crystallized film which are compounded together. The preparation method comprises the following steps of firstly, preparing a BiFe(0.97-x)Mn0.03TMxO3 / CoFe2O4 precursor solution and a CoFe2O4 precursor solution respectively; and then carrying out spin coating on a substrate to prepare a multi-layer CoFe2O4 film, and then carrying out spin coating on the CoFe2O4 film so as to prepare a multi-layer BiFe(0.97-x)Mn0.03TMxO3 / CoFe2O4 film, thereby obtaining the target product. According to the invention, the equipment requirement is simple; the prepared film is good in uniformity; chemical components are accurate and controllable; the doped amount is easy to control; the ferroelectric properties and the ferromagnetic property of a film are improved greatly, so that the film has high residual polarization value and a residual magnetization value.

The invention provides a method for preparing a BiFe1-xCrxO3 ferroelectric film by using a sol-gel method. The method comprises the following steps of: dissolving bismuth nitrate, ferric nitrate and chromic nitrate according to a molar ratio of 1.05: (1-x): x into a mixed solution containing ethylene glycol monomethyl ether, acetic oxide and cholamine, and magnetically stirring to obtain a stable BiFe1-xCrxO3 precursor with the metal ion concentration of 0.003-0.3mol / L, wherein x is equal to 0.00-0.03, and the volume ratio of the ethylene glycol monomethyl ether to the acetic oxide to the cholamine is 14: 5: 1. A film is prepared by spin-coating the BiFe1-xCrxO3 precursor on an FTO (Fluorine-doped Tin Oxide) / glass substrate by using a spin-coating method, and a crystalline BiFe1-xCrxO3 film is obtained by adopting a layer-by-layer annealing process. The method disclosed by the invention has simple requirements on equipment, and experimental conditions are easy to achieve; the prepared film is better in uniformity, and the doping amount is easy to control; and the ferroelectric property of the BiFeO3 film is improved through B-bit Cr doping.

The invention provides a Bi1-xRExFeO3 / CoFe2O4 multiferroic composite membrane and a preparation method thereof. The composite membrane comprises a Bi1-xRExFeO3 crystalline state membrane and a CoFe2O4 crystalline state membrane which are combined together, wherein RE is Ce, Pr, Tb, Eu or Yb, x is equal to 0.05-0.15; in the preparation, Bi1-xRExFeO3 precursor solution and CoFe2O4 precursor solution are firstly prepared respectively; and then, multi-layer CoFe2O4 membrane is prepared by spinning on a substrate, and the multi-layer Bi1-xRExFeO3 membrane is prepared by spinning on the CoFe2O4 membrane, so the target product is obtained. The facility request is simple, the homogeneity of the prepared membrane is good, the chemical composition can be accurately controlled, the doping content is easily controlled, and the ferroelectric property and ferromagnetic property of the membrane are greatly improved, so the Bi1-xRExFeO3 / CoFe2O4 multiferroic composite membrane has high residual polarization value and residual magnetization value.

The invention discloses a method for evaluating the quality of a relocated stereoscopic image based on structural features, which calculates the local information preservation feature of the relocated virtual viewpoint image, the forward information loss of the original virtual viewpoint image, and the reconstruction from the original virtual viewpoint image. The backward information loss of the virtual view point image is obtained, the spatial structure feature vector of the repositioned virtual view point image is obtained, and all the disparity images between the left and right view point images of the repositioned stereo image are calculated. The parallax amplitude features of the pixels belonging to the cross parallax area and the relative width features of all the pixels belonging to the occlusion area are obtained to obtain the depth structure feature vector, and finally the structure feature vector of the repositioned stereo image is obtained; The feature vector is trained to obtain the support vector regression training model; the advantage is that the correlation between the objective evaluation result and the subjective perception of the human eye is improved.

The invention discloses a multiferroic Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3-NiFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 crystalline state film and a NiFe2O4 crystalline state film which are compounded together. The preparation method comprises the following steps: respectively preparing a Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 precursor solution and a NiFe2O4 precursor solution; and spinning on a substrate to prepare a multilayer NiFe2O4 film, and spinning on the NiFe2O4 film to prepare a multilayer Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 film, thereby obtaining the target product. The equipment requirement is simple, the prepared film is high in uniformity, the doping amount is easy to control, and the ferroelectric properties and ferromagnetic properties of the film are greatly improved. Meanwhile, the leakage current density of the film is effectively reduced.

The invention relates to a Bi1-xSmxFe0.94Mn0.04Cr0.02O3 ferroelectric film with high remanent polarization and low leakage current density and a preparation method thereof. The method comprises the steps of dissolving bismuth nitrate, ferric nitrate, samarium nitrate, manganese acetate and chromic nitrate into mixed ethylene glycol monomethyl ether according to the mole ratio of (1.05-x): x: 0.94: 0.04: 0.02, then, adding acetic anhydride, and adding ethanolamine to adjust viscosity, so as to obtain a Bi1-xSmxFe0.94Mn0.04Cr0.02O3 precursor solution with the metal ion concentration of 0.003-0.3mol / L; uniformly dispensing the Bi1-xSmxFe0.94Mn0.04Cr0.02O3 precursor solution on a FTO / glass substrate, of which the surface reaches atomic cleanliness, by adopting a spin-coating method, so as to prepare a film, then, drying to obtain a dry film, and then, adopting a layer-by-layer annealing process, thereby obtaining the Bi1-xSmxFe0.94Mn0.04Cr0.02O3 film. The method has the advantages that the requirements for equipment are simple, the experimental conditions are easily met, the prepared film is relatively good in uniformity and easy in doped amount control, the remanent polarization of the film is increased greatly, and the leakage current density of the film is reduced effectively.

The invention discloses a multiferroic Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3-CuFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3 (x=0.01-0.05) crystalline film in the upper layer and a CuFe2O4 crystalline film in the lower layer. The preparation method comprises respectively preparing a Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3 precursor solution and a CuFe2O4 precursor solution, carrying out spin-coating on a substrate with multiple CuFe2O4 films and carrying out spin-coating on the CuFe2O4 film with multiple Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3 films to obtain the multiferroic Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3-CuFe2O4 composite film. The preparation method has simple equipment requirements, can prepare the film with good uniformity, easily controls a doping amount, improves ferroelectric and ferromagnetic properties of the film and effectively reduces film leakage current density.

The invention provides a Bi0.9Er0.1Fe1-xCoxO3 film with high ferromagnetism and ferroelectricity, and a making method thereof. The method comprises the following steps: preparing a Bi0.9Er0.1Fe1-xCoxO3 precursor solution from bismuth nitrate, iron nitrate, cobalt nitrate and erbium nitrate, spin-coating a substrate with the Bi0.9Er0.1Fe1-xCoxO3 (x is 0.01-0.03) precursor solution, uniformly sizing, drying, and annealing to obtain the Bi0.9Er0.1Fe1-xCoxO3 film with high ferromagnetism and ferroelectricity. The method has the advantages of simple device requirements, easy reaching of experiment conditions, easy control of the doping amount, and great improvement of the ferromagnetism of a BiFeO3 film, and the Bi0.9Er0.1Fe1-xCoxO3 film made in the invention has the advantages of good uniformity, high magnetic intensity and high remanent polarization.

The invention relates to a BiFe0.96-yMn0.04CryO3 ferroelectric film with high remanent polarization and high dielectric constant and a preparation method thereof. The method comprises the steps of mixing bismuth nitrate, ferric nitrate, manganese acetate and chromic nitrate according to the mole ratio of 1.05: (0.96-y): 0.04: y, then, dissolving a mixture into mixed ethylene glycol monomethyl ether, and then, adding acetic anhydride, so as to obtain a BiFe0.96-yMn0.04CryO3 precursor solution with the metal ion concentration of 0.003-0.3mol / L; uniformly dispensing the BiFe0.96-yMn0.04CryO3 precursor solution on a FTO / glass substrate, of which the surface reaches atomic cleanliness, by adopting a spin-coating method, so as to prepare a film, then, drying to obtain a dry film, and then, adopting a layer-by-layer annealing process, thereby obtaining the crystalline BiFe0.96-yMn0.04CryO3 film. The method has the advantages that the requirements for equipment are simple, the experimental conditions are easily met, the prepared film is relatively good in uniformity and easy in doped amount control, and the ferroelectric properties and dielectric properties of the film can be improved greatly.

The invention provides a Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 / Mn(1-x)CoxFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 crystalline-state film and a Mn(1-x)CoxFe2O4 crystalline-state film which are compounded together. The preparation method comprises the following steps: respectively preparing a Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 precursor solution and a Mn(1-x)CoxFe2O4 precursor solution; then spinning on a substrate to prepare a multi-layer Mn(1-x)CoxFe2O4 film; and spinning on the Mn(1-x)CoxFe2O4 film to prepare a multi-layer Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 film which is the target product. In the invention, the equipment requirements are simple, the prepared film has relatively good uniformity, the doping amount is easy to control, the ferroelectric property and ferromagnetic property of the film are remarkably improved, and the leak current density of the film is effectively reduced at the same time.