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Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3/Mn(1-x)CoxFe2O4 composite film and preparation method thereof

A technology of mn1-xcoxfe2o4 and composite film, which is applied in the field of functional materials, can solve the problems of large leakage current, limited development, and difficulty in obtaining polarization curves, etc., and achieve the goal of reducing leakage conduction current, reducing defects, and reducing oxygen vacancy content Effect

Active Publication Date: 2015-04-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in BiFeO 3 due to Fe 3+ Valence fluctuations and the BiFeO 3 The volatilization of Bi during the film preparation process leads to the formation of oxygen vacancies in the film, thus BiFeO 3 There is often a large leakage current, and it is difficult to obtain a relatively saturated polarization curve
At the same time, BiFeO 3 The weak magnetism of the material at room temperature also limits its further development

Method used

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  • Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3/Mn(1-x)CoxFe2O4 composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1, dissolving ferric nitrate and manganese acetate in a molar ratio of 2:1 in ethylene glycol methyl ether (x=0), then adding acetic anhydride to obtain a stable MnFe with a total metal ion concentration of 0.2mol / L 2 o 4 Precursor solution, wherein the volume ratio of ethylene glycol methyl ether and acetic anhydride is 3:1;

[0034] Step 2, bismuth nitrate, ferric nitrate, erbium nitrate, cobalt nitrate and manganese acetate are dissolved in the solvent (excessive bismuth nitrate) to obtain a total concentration of metal ions of 0.945:0.96:0.10:0.02:0.02. Stable Bi of L 0.90 Er 0.10 Fe 0.96 co 0.02 mn 0.02 o 3 Precursor solution, the volume ratio of ethylene glycol methyl ether and acetic anhydride is 3:1;

[0035] Step 3: Select the FTO / glass substrate as the substrate, place the cut FTO / glass substrate in detergent, acetone, and ethanol in sequence, and use ultrasonic cleaning. After each ultrasonic cleaning for 10 minutes, rinse the substrate with a lar...

Embodiment 2

[0040] Step 1, dissolve ferric nitrate, cobalt nitrate and manganese acetate in a molar ratio of 2:0.2:0.8 in ethylene glycol methyl ether (x=0.2), then add acetic anhydride to obtain a total metal ion concentration of 0.2mol / L The stable Mn 0.8 co 0.2 Fe 2 o 4 Precursor solution, wherein the volume ratio of ethylene glycol methyl ether and acetic anhydride is 3:1;

[0041] Step 2, bismuth nitrate, ferric nitrate, erbium nitrate, cobalt nitrate and manganese acetate are dissolved in the solvent (excessive bismuth nitrate) to obtain a total concentration of metal ions of 0.945:0.96:0.10:0.02:0.02. Stable Bi of L 0.90 Er 0.10 Fe 0.96 co 0.02 mn 0.02 o 3 Precursor solution, the volume ratio of ethylene glycol methyl ether and acetic anhydride is 3:1;

[0042] Step 3: Select the FTO / glass substrate as the substrate, place the cut FTO / glass substrate in detergent, acetone, and ethanol in sequence, and use ultrasonic cleaning. After each ultrasonic cleaning for 10 minutes,...

Embodiment 3

[0047] Step 1, dissolve ferric nitrate, cobalt nitrate and manganese acetate in a molar ratio of 2:0.4:0.6 in ethylene glycol methyl ether (x=0.4), then add acetic anhydride to obtain a total metal ion concentration of 0.2mol / L The stable Mn 0.6 co 0.4 Fe 2 o 4 Precursor solution, wherein the volume ratio of ethylene glycol methyl ether and acetic anhydride is 3:1;

[0048] Step 2, bismuth nitrate, ferric nitrate, erbium nitrate, cobalt nitrate and manganese acetate are dissolved in the solvent (excessive bismuth nitrate) to obtain a total concentration of metal ions of 0.945:0.96:0.10:0.02:0.02. Stable Bi of L 0.90 Er 0.10 Fe 0.96 co 0.02 mn 0.02 o 3 Precursor solution, the volume ratio of ethylene glycol methyl ether and acetic anhydride is 3:1;

[0049] Step 3: Select the FTO / glass substrate as the substrate, place the cut FTO / glass substrate in detergent, acetone, and ethanol in sequence, and use ultrasonic cleaning. After each ultrasonic cleaning for 10 minutes,...

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Abstract

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.

Description

technical field [0001] The invention belongs to the field of functional materials, relates to a composite film and a preparation method thereof, in particular to a Bi 0.90 Er 0.10 Fe 0.96 co 0.02 mn 0.02 o 3 / Mn 1-x co x Fe 2 o 4 Composite membrane and method for its preparation. Background technique [0002] BiFeO 3 As one of the few multiferroic materials with both ferroelectric order (TC = 810°C) and G-type antiferromagnetic order (TN = 380°C) at room temperature, due to its magnetoelectric coupling properties in information storage, spin It is widely used in electronic devices, image display, pyroelectric effect, uncooled infrared focal plane array, etc. In recent years, around BiFeO 3 Multiferroic materials have been studied more and more. Pure phase BiFeO 3 With a distorted perovskite structure (belonging to the R3c point group), the Fe atoms in the center of the unit cell and the six oxygen atoms at the face center form an iron-oxygen octahedron. Due to ...

Claims

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Application Information

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IPC IPC(8): C03C17/34
Inventor 谈国强郑玉娟任慧君夏傲
Owner SHAANXI UNIV OF SCI & TECH
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