Preparation method of all-oxide soft-hard magnetic composite film (NZFO/SLCFO)3/Al2O3

A composite thin film and oxide technology, which is applied in the application of magnetic film to substrate, chemical vapor deposition application, heat treatment application, etc., can solve the problems of chemical preparation of ferrite multilayer composite thin film materials that have not been seen, and achieve Low cost, improved stability, and the effect of avoiding coagulation

Inactive Publication Date: 2018-10-19
HEFEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, all current researches are focused on the use of vacuum methods (such as pulsed laser deposition, magnetron sputtering, molecular beam epitaxy, electron beam deposition, etc.), and the chemical preparation of ferrite multilayer composite thin film materials has not yet been seen. report

Method used

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  • Preparation method of all-oxide soft-hard magnetic composite film (NZFO/SLCFO)3/Al2O3
  • Preparation method of all-oxide soft-hard magnetic composite film (NZFO/SLCFO)3/Al2O3
  • Preparation method of all-oxide soft-hard magnetic composite film (NZFO/SLCFO)3/Al2O3

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Effect test

Embodiment 1

[0026] An all-oxide soft-hard magnetic composite film (NZFO / SLCFO) 3 / Al 2 o 3 A preparation method comprising the steps of:

[0027] S1. Weigh nickel nitrate, zinc nitrate, and iron citrate respectively according to the molar ratio of nickel, zinc, and iron at 0.65:0.35:2.0, and dissolve nickel nitrate, zinc nitrate, and iron citrate in monomethyl diethyl ether aqueous solution respectively. , mix evenly, add polyethylene glycol with a molecular weight of 18000, heat to 30°C and stir for reaction, then let stand for 1d to obtain Ni 0.65 Zn 0.35 Fe 2 o 4 Precursor colloid;

[0028] S2. Weigh strontium nitrate, lanthanum nitrate, iron citrate, and cobalt nitrate respectively according to the molar ratio of strontium, lanthanum, iron, and cobalt as 0.75:0.25:11.75:0.25, respectively After dissolving in monomethyl diethyl ether aqueous solution, mix evenly, add polyethylene glycol with a molecular weight of 22000, heat to 70°C and stir for reaction, then let stand for 90 d...

Embodiment 2

[0032] An all-oxide soft-hard magnetic composite film (NZFO / SLCFO) 3 / Al 2 o 3 A preparation method comprising the steps of:

[0033] S1. Weigh nickel nitrate, zinc nitrate, and iron citrate respectively according to the molar ratio of nickel, zinc, and iron of 0.7:0.3:2.0, and dissolve the nickel nitrate, zinc nitrate, and iron citrate in monomethyl diethyl ether aqueous solution respectively. , mix evenly, add polyethylene glycol with a molecular weight of 22000, heat to 70°C and stir for reaction, then let stand for 90d to obtain Ni 0.7Zn 0.3 Fe 2 o 4 Precursor colloid;

[0034] S2. Weigh strontium nitrate, lanthanum nitrate, iron citrate, and cobalt nitrate respectively according to the molar ratio of strontium, lanthanum, iron, and cobalt as 0.8:0.2:11.8:0.2, respectively After dissolving in monomethyl diethyl ether aqueous solution, mix evenly, add polyethylene glycol with a molecular weight of 18000, heat to 30°C and stir for reaction, then let stand for 1d to ob...

Embodiment 3

[0038] An all-oxide soft-hard magnetic composite film (NZFO / SLCFO) 3 / Al 2 o 3 A preparation method comprising the steps of:

[0039] S1. Weigh nickel nitrate, zinc nitrate, and iron citrate respectively according to the molar ratio of nickel, zinc, and iron at 0.6:0.4:2.0, and dissolve nickel nitrate, zinc nitrate, and iron citrate in monomethyl diethyl ether aqueous solution respectively. , mix evenly, add polyethylene glycol with a molecular weight of 20000, heat to 50°C and stir for reaction, then let stand for 40d to obtain Ni 0.6 Zn 0.4 Fe 2 o 4 Precursor colloid;

[0040] S2. Weigh strontium nitrate, lanthanum nitrate, iron citrate, and cobalt nitrate respectively according to the molar ratio of strontium, lanthanum, iron, and cobalt as 0.8:0.2:11.8:0.2, respectively After dissolving in monomethyl diethyl ether aqueous solution, mix evenly, add polyethylene glycol with a molecular weight of 20,000, heat to 50°C and stir for reaction, then let stand for 50 days to...

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Abstract

The invention provides a preparation method of all-oxide soft-hard magnetic composite film (NZFO / SLCFO)3 / Al2O3. The method includes the following steps that soluble nickel salt, zinc salt and iron salt are dissolved in a solvent separately and then mixed evenly, a surfactant is added into the mixture, and after heating, stirring and still standing, a Ni0.7Zn0.3Fe2O4 colloid precursor is obtained;soluble strontium salt, lanthanum salt, iron salt and cobalt salt are dissolved in a solvent separately and mixed evenly, a surfactant is added into the mixture, and after heating, stirring and stillstanding, a Sr0.8La0.2Fe11.8Co0.2O19 colloid precursor is obtained; a Al2O3(001) substrate is spin-coated with the Sr0.8La0.2Fe11.8Co0.2O19 colloid precursor and then spin-coated with the Ni0.7Zn0.3Fe2O4 colloid precursor after drying and in-air annealing treatment, and a prefabricated material A is prepared through drying and in-air annealing treatment; the prefabricated material A is treated twice according to the step 3, a prefabricated material B is prepared, and after temperature rise and annealing treatment, the all-oxide soft-hard magnetic composite film (NZFO / SLCFO)3 / Al2O3 is obtained.According to the method, the colloid precursors are synthesized by a chemical solution method, and in cooperation with the spin-coating process, the all-oxide soft-hard magnetic composite film is prepared. The preparation process is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of permanent magnetic thin films, in particular to an all-oxide soft-hard magnetic composite thin film (NZFO / SLCFO) 3 / Al 2 o 3 method of preparation. Background technique [0002] Due to the advantages of high efficiency, energy saving, easy operation and high reliability, multi-layer composite permanent magnetic film materials have broad application prospects in many fields such as household appliances, office automation, communications, audio-visual, computers, and automobile industries. With the implementation of the national sustainable strategy and the progress of human civilization, modern society not only has an increasing demand for permanent magnetic thin film materials, but also puts forward higher and higher requirements for its performance and environmental protection. At present, the commonly used longitudinal magnetic recording medium is alloy film, and its main defect is that it is easy to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/14H01F41/22
CPCH01F41/14H01F41/22
Inventor 訾振发马小航
Owner HEFEI NORMAL UNIV
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