Unlock instant, AI-driven research and patent intelligence for your innovation.

BTO/NZFO composite multiferroic thin film with (111) orientation growth NZFO crystal column array and preparation method

A technology of multiferroic thin films and column arrays is applied in the manufacture/processing of electromagnetic devices, material selection, etc., which can solve the problems of complex preparation conditions and poor magnetoelectric coupling performance, and achieve the effect of high magnetoelectric coupling performance.

Active Publication Date: 2022-05-17
ZHEJIANG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a traditional sol-gel method and not based on a specific And expensive single crystal substrates are prepared by in-situ formation of epitaxial orientation to prepare BaTiO with (111) oriented NZFO single crystal phase column random distribution array and high magnetoelectric coupling performance 3 / Ni 0.5 Zn 0.5 Fe 2 o 4 Composite film material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • BTO/NZFO composite multiferroic thin film with (111) orientation growth NZFO crystal column array and preparation method
  • BTO/NZFO composite multiferroic thin film with (111) orientation growth NZFO crystal column array and preparation method
  • BTO/NZFO composite multiferroic thin film with (111) orientation growth NZFO crystal column array and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1, take 0.001mol of barium acetate powder and dissolve it in 15mL of ethylene glycol, and magnetically stir for 1h to obtain a transparent Ba sol precursor (1);

[0043] Step 2, take 0.001mol of tetrabutyl titanate and dissolve it in 10ml of ethylene glycol, and add 0.001mol of acetylacetone dropwise, and magnetically stir for 1h to obtain a transparent Ti sol precursor (2);

[0044] Step 3, adding the Ba sol precursor (1) to the Ti sol precursor (2), and magnetic stirring for 3 hours to obtain the BTO sol (3);

[0045] Step 4, take 0.009mol of nickel nitrate hexahydrate powder, 0.009mol of zinc nitrate hexahydrate, 0.009mol of ferric nitrate nonahydrate, and 0.018mol of citric acid monohydrate, dissolve them in 25ml of ethylene glycol, stir magnetically for 3 hours, and obtain NZFO sol (4); step 5, add BTO sol (3) to NZFO sol (4), and magnetically stir for 3 hours to obtain a composite sol with a phase composition ratio of BTO / NZFO=1 / 9; then seal and stand at room...

Embodiment 2

[0056] Step 1, take 0.002mol of barium acetate powder and dissolve it in 15mL of ethylene glycol, and magnetically stir for 1h to obtain a transparent Ba sol precursor (1);

[0057] Step 2, take 0.002mol of tetrabutyl titanate and dissolve it in 10ml of ethylene glycol, and add 0.002mol of acetylacetone dropwise, and magnetically stir for 1h to obtain a transparent Ti sol precursor (2);

[0058] Step 3, adding the Ba sol precursor (1) to the Ti sol precursor (2), stirring magnetically for 4 hours to obtain the BTO sol (3);

[0059] Step 4, take 0.008mol of nickel nitrate hexahydrate powder, 0.008mol of zinc nitrate hexahydrate, 0.008mol of ferric nitrate nonahydrate, and 0.016mol of citric acid monohydrate, dissolve them in every 25ml of ethylene glycol, and stir magnetically for 4 hours. Obtain NZFO sol (4);

[0060] Step 5, adding the BTO sol (3) into the NZFO sol (4), and magnetic stirring for 4 hours. Among them, the relative addition amount of BTO sol (3) and NZFO sol (...

Embodiment 3

[0072] Step 1, take 0.003mol of barium acetate powder and dissolve it in 15mL of ethylene glycol, and magnetically stir for 2h to obtain a transparent Ba sol precursor (1);

[0073] Step 2, take 0.003 mol of tetrabutyl titanate and dissolve it in 10 ml of ethylene glycol, and add 0.003 mol of acetylacetone dropwise, and magnetically stir for 2 hours to obtain a transparent Ti sol precursor (2);

[0074] Step 3, adding the Ba sol precursor (1) to the Ti sol precursor (2), and magnetic stirring for 5 hours to obtain the BTO sol (3);

[0075]Step 4, take 0.007mol of nickel nitrate hexahydrate powder, 0.007mol of zinc nitrate hexahydrate, 0.007mol of ferric nitrate nonahydrate, and 0.014mol of citric acid monohydrate, dissolve them in 25ml of ethylene glycol, stir magnetically for 5 hours, and obtain NZFO sol (4); step 5, adding BTO sol (3) into NZFO sol (4), and magnetic stirring for 5 hours. Among them, the relative addition amount of BTO sol (3) and NZFO sol (4) is controlled,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a BTO / NZFO multi-phase multiferroic thin film with (111) orientation NZFO crystal column array distribution. Firstly, a sol precursor is prepared by a sol-gel method, and then spin-coated on a single crystal silicon substrate. The first layer of film is prepared, pretreated by ultraviolet ozone, and then controlled in the rapid heating furnace by combining the thickness of the first layer of film deposition and heat treatment at high temperature to control the process of phase separation and heterogeneous nucleation in the first layer of the film layer. In situ, an induced film layer with a two-phase separation structure and NZFO crystallization and (111) orientation is prepared, and then a multi-phase film is obtained through a multi-step repeated spin-coating-heat treatment process, and a BTO pure-phase film is covered on the multi-phase film so that It is filled between the NZFO crystal phase pillars. This multi-phase plus single-phase multi-layer structure film of the present invention successfully realizes the in-situ formation of BTO / NZFO multi-phase thin film material 1-3 type microstructure, and the material has a high The magnetoelectric coupling effect. Under the action of an external magnetic field, a magnetization mutation of up to 40% is obtained at the Curie point of ferroelectric phase BTO, which is of great significance.

Description

technical field [0001] The invention belongs to the field of multiferroic thin film materials, and relates to a method for preparing a multiphase multiferroic thin film, in particular to a sol-gel method that controls two-dimensional phase separation through a combination of an extremely thin film layer and interface energy and has (111) orientation growth NZFO Type 1-3 microstructure BaTiO with crystal column array 3 / Ni 0.5 Zn 0.5 Fe 2 o 4 Composite multiferroic thin film and its preparation method. Background technique [0002] With the rapid development of the information age, the development of a new generation of miniaturized and multifunctional electromagnetic sensing devices is of great significance and has been paid more and more attention. The multiferroic magnetoelectric material has ferroelectric and ferromagnetic properties at the same time, and on this basis has magnetoelectric coupling properties, that is, the change of the magnetic properties of the mate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L43/10H01L43/12H10N50/01
CPCH10N50/01H10N50/85
Inventor 杜丕一田薇李谷尧吕爽王宗荣马宁
Owner ZHEJIANG UNIV