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Bi0.92-xHo0.08AExFe0.97Mn0.03O3-Zn1-yNiyFe2O4 ferromagnetic composite film and preparation method thereof

A zn1-yniyfe2o4, composite thin film technology, used in chemical instruments and methods, layered products, ceramic layered products, etc.

Inactive Publication Date: 2016-08-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the advantages of the above two materials can be combined, multiferroic materials with excellent properties can be obtained, but there is no related report

Method used

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  • Bi0.92-xHo0.08AExFe0.97Mn0.03O3-Zn1-yNiyFe2O4 ferromagnetic composite film and preparation method thereof
  • Bi0.92-xHo0.08AExFe0.97Mn0.03O3-Zn1-yNiyFe2O4 ferromagnetic composite film and preparation method thereof
  • Bi0.92-xHo0.08AExFe0.97Mn0.03O3-Zn1-yNiyFe2O4 ferromagnetic composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1, dissolve zinc nitrate, nickel acetate and iron nitrate in a molar ratio of 0.5:0.5:2 (y=0.5) in ethylene glycol methyl ether, stir for 30 minutes, and then add acetic anhydride to obtain a Fe ion concentration of 0.1 mol / L of stable Zn 0.5 Ni 0.5 Fe 2 o 4 Precursor, where Zn 0.5 Ni 0.5 Fe 2 o 4 The volume ratio of ethylene glycol methyl ether and acetic anhydride in the precursor solution is 3:1;

[0038] Step 2, dissolving bismuth nitrate, holmium nitrate, strontium nitrate, iron nitrate and manganese nitrate in a molar ratio of 0.89:0.08:0.03:0.97:0.03 in a solvent (AE=Sr, x=0.03, bismuth nitrate excess 5%) , to obtain a stable Bi with a total metal ion concentration of 0.3 mol / L 0.89 Ho 0.08 Sr 0.03 Fe 0.97 mn 0.03 o 3 Precursor solution; wherein the solvent is a mixed solution of ethylene glycol methyl ether and acetic anhydride in a volume ratio of 3:1;

[0039] Step 3, choose the FTO / glass substrate as the substrate, place the cut FTO / glass s...

Embodiment 2

[0045] Step 1, dissolve zinc nitrate, nickel acetate and iron nitrate in a molar ratio of 0.5:0.5:2 (y=0.5) in ethylene glycol methyl ether, stir for 30 minutes, and then add acetic anhydride to obtain a Fe ion concentration of 0.1 mol / L of stable Zn 0.5 Ni 0.5 Fe 2 o 4 Precursor, where Zn 0.5 Ni 0.5 Fe 2 o 4 The volume ratio of ethylene glycol methyl ether and acetic anhydride in the precursor solution is 3:1;

[0046] Step 2, dissolving bismuth nitrate, holmium nitrate, calcium nitrate, ferric nitrate and manganese nitrate in a solvent in a molar ratio of 0.91:0.08:0.01:0.97:0.03 (AE=Ca, x=0.01, excess bismuth nitrate 5%) , to obtain a stable Bi with a total metal ion concentration of 0.3 mol / L 0.91 Ho 0.08 Ca 0.01 Fe 0.97 mn 0.03 o 3 Precursor solution; wherein the solvent is a mixed solution of ethylene glycol methyl ether and acetic anhydride in a volume ratio of 3:1;

[0047] Step 3, choose the FTO / glass substrate as the substrate, place the cut FTO / glass s...

Embodiment 3

[0053] Step 1, dissolve zinc nitrate, nickel acetate and iron nitrate in a molar ratio of 0.5:0.5:2 (y=0.5) in ethylene glycol methyl ether, stir for 30 minutes, and then add acetic anhydride to obtain a Fe ion concentration of 0.1 mol / L of stable Zn 0.5 Ni 0.5 Fe 2 o 4 Precursor, where Zn 0.5 Ni 0.5 Fe 2 o 4 The volume ratio of ethylene glycol methyl ether and acetic anhydride in the precursor solution is 3:1;

[0054] Step 2, dissolving bismuth nitrate, holmium nitrate, barium nitrate, ferric nitrate and manganese nitrate in a solvent in a molar ratio of 0.89:0.08:0.03:0.97:0.03 (AE=Ba, x=0.03, bismuth nitrate excess 5%) , to obtain a stable Bi with a total metal ion concentration of 0.3 mol / L 0.89 Ho 0.08 Ba 0.03 Fe 0.97 mn 0.03 o 3 Precursor solution; wherein the solvent is a mixed solution of ethylene glycol methyl ether and acetic anhydride in a volume ratio of 3:1;

[0055] Step 3, choose the FTO / glass substrate as the substrate, place the cut FTO / glass su...

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Abstract

The invention provides a Bi0.92-xHo0.08AExFe0.97Mn0.03O3-Zn1-yNiyFe2O4 ferromagnetic composite film and a preparation method thereof. The ferromagnetic composite film comprises a Bi0.92-xHo0.08AExFe0.97Mn0.03O3 crystalline film and a Zn1-yNiyFe2O4 crystalline film, which are compounded together. The preparation method is as below: first respectively preparing a Zn1-yNiyFe2O4 precursor solution and a Bi0.92-xHo0.08AExFe0.97Mn0.03O3 precursor solution, wherein AE is Sr, Ca, Ba or Pb, x equals to 0.01-0.04, and y equals to 0.1-0.9; preparing a plurality of Zn1-yNiyFe2O4 films on a substrate by spin coating; and then preparing plurality of Bi0.92-xHo0.08AExFe0.97Mn0.03O3 films on the Zn1-yNiyFe2O4 films by spin coating, so as to obtain the ferromagnetic composite film. The method regulates the crystal structure of BiFeO3 by doping, and uses ferromagnetic Zn1-yNiyFe2O4 as the magnetic layer, so as to substantially increase the ferroelectric and ferromagnetic properties of the film, and effectively reduce the leakage current density of the film.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a method for preparing a ferromagnetic composite thin film on the surface of a functionalized substrate, in particular to a Bi 0.92-x Ho 0.08 AE x Fe 0.97 mn 0.03 o 3 -Zn 1-y Ni y Fe 2 o 4 Ferromagnetic composite thin film and its preparation method. Background technique [0002] Single-phase magnetoelectric multiferroic materials have not been applied in practice so far, mainly because the Curie temperature of most single-phase materials is low, and the magnetoelectric effect is only available at extremely low temperatures, and the magnetoelectric effect is very weak . Although single-phase BiFeO 3 Both the Curie temperature and the Neel temperature of the material are above room temperature, but due to the BiFeO 3 The helical magnetic structure makes BiFeO 3 It exhibits G-type antiferromagnetism, and only shows weak ferromagnetism under low electric field, and its...

Claims

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Application Information

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IPC IPC(8): C04B35/26B32B18/00
CPCC04B35/2633B32B18/00C04B35/2641C04B35/265C04B2235/3208C04B2235/3213C04B2235/3215C04B2235/3224C04B2235/3262C04B2235/3279C04B2235/3284C04B2235/3296C04B2235/3298
Inventor 谈国强杨玮耶维乐忠威夏傲任慧君
Owner SHAANXI UNIV OF SCI & TECH
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