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A bi with high ferromagnetic and ferroelectric properties 0.9 er 0.1 fe 1‑x co x o 3 Thin film and its preparation method

A technology with ferroelectric properties and magnetic properties, applied in the field of functional materials, can solve problems such as restricting development, achieve the effects of reducing defects, improving magnetoelectric properties, and improving magnetic properties

Active Publication Date: 2018-01-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

BiFeO 3 The material is only weakly magnetic at room temperature, which will limit its further development

Method used

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  • A bi with high ferromagnetic and ferroelectric properties <sub>0.9</sub> er <sub>0.1</sub> fe <sub>1‑x</sub> co <sub>x</sub> o <sub>3</sub> Thin film and its preparation method
  • A bi with high ferromagnetic and ferroelectric properties <sub>0.9</sub> er <sub>0.1</sub> fe <sub>1‑x</sub> co <sub>x</sub> o <sub>3</sub> Thin film and its preparation method
  • A bi with high ferromagnetic and ferroelectric properties <sub>0.9</sub> er <sub>0.1</sub> fe <sub>1‑x</sub> co <sub>x</sub> o <sub>3</sub> Thin film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1, dissolving bismuth nitrate, erbium nitrate, iron nitrate and cobalt nitrate in a solvent with a molar ratio of 0.945:0.10:0.99:0.01 (excessive bismuth nitrate, x=0.01), magnetically stirred for 2.5 hours to obtain the total concentration of metal ions Stable Bi at 0.1mol / L 0.9 Er 0.1 Fe 0.99 co 0.01 o 3 A precursor solution, wherein the solvent is a mixed solution of ethylene glycol methyl ether and acetic anhydride with a volume ratio of 2.5:1;

[0032] Step 2: Select the FTO / glass substrate as the substrate, place the substrate in detergent, acetone, and ethanol in sequence, and clean it with ultrasonic waves for 10 minutes, then wash the substrate with distilled water and dry it with nitrogen; then place it in an oven at 60°C Baked for 5 minutes, then took it out and let it stand to room temperature; finally, placed the substrate in a UV irradiator for 40 minutes to make the surface of the substrate reach "atomic cleanliness". Spin-coat Bi on the FTO / gla...

Embodiment 2

[0035] Step 1, bismuth nitrate, erbium nitrate, ferric nitrate and cobalt nitrate are dissolved in the solvent (excessive bismuth nitrate, x=0.02) in a molar ratio of 0.945:0.10:0.98:0.02, and the total concentration of metal ions obtained after magnetic stirring for 2h is 0.2mol / L stable Bi 0.9 Er 0.1 Fe 0.98 co 0.02 o 3 A precursor solution, wherein the solvent is a mixed solution of ethylene glycol methyl ether and acetic anhydride with a volume ratio of 3:1;

[0036] Step 2: Select the FTO / glass substrate as the substrate, place the substrate in detergent, acetone, and ethanol in sequence, and clean it with ultrasonic waves for 10 minutes, then wash the substrate with distilled water and dry it with nitrogen; then place it in an oven at 60°C Baked for 5 minutes, then took it out and let it stand to room temperature; finally, placed the substrate in a UV irradiator for 40 minutes to make the surface of the substrate reach "atomic cleanliness". Spin-coat Bi on the FTO / g...

Embodiment 3

[0043] Step 1, bismuth nitrate, erbium nitrate, iron nitrate and cobalt nitrate are dissolved in the solvent (excessive bismuth nitrate, x=0.01) with molar ratio of 0.945:0.10:0.97:0.03, and the total concentration of metal ions obtained after magnetic stirring for 2h is 0.3mol / L stable Bi 0.9 Er 0.1 Fe 0.97 co 0.03 o 3 A precursor solution, wherein the solvent is a mixed solution of ethylene glycol methyl ether and acetic anhydride with a volume ratio of 3:1;

[0044] Step 2: Select the FTO / glass substrate as the substrate, place the substrate in detergent, acetone, and ethanol in sequence, and clean it with ultrasonic waves for 10 minutes, then wash the substrate with distilled water and dry it with nitrogen; then place it in an oven at 60°C Baked for 5 minutes, then took it out and let it stand to room temperature; finally, placed the substrate in a UV irradiator for 40 minutes to make the surface of the substrate reach "atomic cleanliness". Spin-coat Bi on the FTO / gla...

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Abstract

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.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to Bi with high ferromagnetic and ferroelectric properties 0.9 Er 0.1 Fe 1-x co x o 3 Thin films and methods for their preparation. Background technique [0002] Multiferroic materials have ferroelectric order (antiferroelectric order), ferromagnetic order (antiferromagnetic order) or ferroelastic order in the same phase at the same time, and within a certain temperature range, these types have The order mutual coupling thus greatly changes the properties of multiferroic materials. As a new type of multifunctional material, multiferroic (magnetoelectric) materials can not only be used in the application field of single ferroic materials, but also show great promise in the fields of new magnetic-electric sensor devices, spintronic devices, and new information storage devices. Huge application prospects. BiFeO 3 It is the only material with a Curie temperature of 850°C and a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/22
Inventor 谈国强郑玉娟乐忠威杨玮夏傲王通任慧君
Owner SHAANXI UNIV OF SCI & TECH
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