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Preparation process for praseodymium- iron- co-doped strontium titanate multiferroic film

A preparation process, the technology of strontium titanate, applied in the field of preparation of multiferroic thin films, can solve the problems of high cost, low phase transition temperature, and difficult synthesis, and achieve low cost, improved uniformity and density, and a preparation process simple effect

Inactive Publication Date: 2015-04-15
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low phase transition temperature, difficult synthesis and high cost of existing single-phase multiferroic materials, and to provide a preparation process of strontium titanate multiferroic film co-doped with praseodymium and iron, which is simple in preparation process , and the prepared strontium titanate multiferroic thin film can exhibit ferroelectricity and magnetic properties at room temperature

Method used

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  • Preparation process for praseodymium- iron- co-doped strontium titanate multiferroic film
  • Preparation process for praseodymium- iron- co-doped strontium titanate multiferroic film
  • Preparation process for praseodymium- iron- co-doped strontium titanate multiferroic film

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Effect test

Embodiment 1

[0023] A preparation process of strontium titanate multiferroic film co-doped with praseodymium and iron, comprising the following steps:

[0024] Step 1. Weigh 0.0039078 mol of strontium acetate and 0.0000167 mol of praseodymium oxide (Pr 6 o 11 ), the molar ratio of strontium and praseodymium is Sr / Pr=0.975 / 0.025; 0.036 mol of butyl titanate and 0.004 mol of ferric nitrate are weighed in molar ratio, and the molar ratio of titanium and iron is Ti / Fe=0.9 / 0.1, standby;

[0025] Step 2. Dissolve all the strontium acetate weighed in step 1 in acetic acid to form a transparent and colorless solution, wherein the ratio of the volume of acetic acid added to the total weight of strontium acetate is 4mL: 1g, and then add ethylene glycol methyl ether, Make the molar concentration of strontium acetate in the solution reach 0.6mol / L, stir for 30 minutes, then add the butyl titanate weighed in step 1, stir for 30 minutes to form solution A, and set aside;

[0026] Step 3. Dissolve al...

Embodiment 2

[0030] A preparation process of strontium titanate multiferroic film co-doped with praseodymium and iron, comprising the following steps:

[0031] Step 1. Weigh 0.0039078 mol of strontium acetate and 0.0000167 mol of praseodymium oxide (Pr 6 o 11 ), the molar ratio of strontium and praseodymium is Sr / Pr=0.975 / 0.025; 0.032 mol of butyl titanate and 0.008 mol of ferric nitrate are weighed in molar ratio, and the molar ratio of titanium and iron is Ti / Fe=0.8 / 0.2, standby;

[0032] Step 2. Dissolve all the strontium acetate weighed in step 1 in acetic acid to form a transparent and colorless solution, wherein the ratio of the volume of acetic acid added to the total weight of strontium acetate is 4mL: 1g, and then add ethylene glycol methyl ether, Make the molar concentration of strontium acetate in the solution reach 0.6mol / L, stir for 30 minutes, then add the butyl titanate weighed in step 1, stir for 30 minutes to form solution A, and set aside;

[0033] Step 3. Dissolve al...

Embodiment 3

[0037] A preparation process of strontium titanate multiferroic film co-doped with praseodymium and iron, comprising the following steps:

[0038] Step 1. Weigh 0.0039078 mol of strontium acetate and 0.0000167 mol of praseodymium oxide (Pr 6 o 11 ), the molar ratio of strontium and praseodymium is Sr / Pr=0.975 / 0.025; 0.028 mol of butyl titanate and 0.012 mol of ferric nitrate are weighed in molar ratio, and the molar ratio of titanium and iron is Ti / Fe=0.7 / 0.3, standby;

[0039] Step 2. Dissolve all the strontium acetate weighed in step 1 in acetic acid to form a transparent and colorless solution, wherein the ratio of the volume of acetic acid added to the total weight of strontium acetate is 4mL: 1g, and then add ethylene glycol methyl ether, Stir for 35 minutes, then add the butyl titanate weighed in step 1, stir for 35 minutes to form solution A, set aside;

[0040] Step 3. Dissolve all the ferric nitrate weighed in step 1 in ethylene glycol methyl ether to form a trans...

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Abstract

A praseodymium- iron- co-doped strontium titanate multiferroic film and a preparation process thereof are disclosed. The strontium titanate film comprises a material the formula of which is Sr[1-x]PrxTi[1-y]FeyO3, wherein 0.025<=x<=0.075, and 0.05<=y<=0.3. The preparation process includes: weighing strontium acetate, praseodymium oxide, butyl titanate and ferric nitrate according to the molar ratio in the formula, dissolving the strontium acetate and the butyl titanate with acetic acid and ethylene glycol monomethyl ether in two steps, dissolving the ferric nitrate with the ethylene glycol monomethyl ether, reacting concentrated nitric acid with the praseodymium oxide, mixing to form a solution C having a concentration of 0.2 mol / L, whirl-coating the solution C in a whirl coating machine, drying and performing thermal decomposition until the film thickness reaches 300 nm, and annealing to obtain the Sr[1-x]PrxTi[1-y]FeyO3 film. Ferroelectricity and magnetism of strontium titanate, which are induced by praseodymium- iron- co-doping, occur around the room temperature. Preparation of a novel single-phase multiferroic material is achieved.

Description

technical field [0001] The invention relates to the preparation of multiferroic thin films in the field of material science and technology, in particular to a preparation process of strontium titanate multiferroic thin films co-doped with praseodymium and iron. Background technique [0002] Single-phase multiferroic materials refer to single-phase compounds that exhibit both ferroelectricity and magnetism. Because various irons are in the same system, they will inevitably interact with each other, so that the mutual regulation between different functions can be realized. It has a rich physical background and great application prospects, so it has become an important research field in condensed matter physics in recent years. One of the hot spots in the research field. [0003] At present, most materials only show the coexistence of ferroelectricity and magnetism at extremely low temperatures, mainly some manganese oxides, such as BiMnO 3 , YMnO 3 and HoMnO 3 etc., the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F10/18H01F41/22C04B35/47C04B35/622
Inventor 王晓飞李新忠胡秋波王赵武张超周锋子
Owner HENAN UNIV OF SCI & TECH
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