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Perovskite type cubic phase doped bismuth ferrite magneto-optical material and preparation method and application thereof

A perovskite-type, magneto-optical material technology, applied in metal material coating technology, optics, nonlinear optics, etc. The problem of adverse effects of light effects, etc., achieves the effect of good optical transmission performance, significant magneto-optical effect, and short period.

Pending Publication Date: 2020-02-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as Bi 3+ BiFeO with higher ion content 3 , although it has shown many advantages in spintronic devices, magnetoelectric sensors, converters, actuators, and high-density ferroelectric memories, and has become one of the most promising material systems, there are no literature reports on its magneto-optical properties. and its application in magneto-optical devices
This is mainly because BiFeO 3 It belongs to the trigonal rhombic crystal system. Due to the special helical G-type antiferromagnetic structure, the macroscopic magnetism of the crystal is very weak, resulting in the magneto-optic effect being too small to be paid attention to.
In addition, BiFeO 3 Belonging to the trigonal crystal system, there is a birefringence effect, which also has an adverse effect on the magneto-optical effect
While the related cubic phase doped BiFeO 3 There are no literature reports on the magneto-optical effect and the preparation of silicon-based thin films.

Method used

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  • Perovskite type cubic phase doped bismuth ferrite magneto-optical material and preparation method and application thereof
  • Perovskite type cubic phase doped bismuth ferrite magneto-optical material and preparation method and application thereof
  • Perovskite type cubic phase doped bismuth ferrite magneto-optical material and preparation method and application thereof

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Embodiment 1

[0028] A cubic phase doped bismuth ferrite magneto-optical material Bi 0.8 Sr 0.2 Fe 0.8 Ti 0.2 O 3 The preparation method comprises the following specific steps:

[0029] (1) Preparation of polycrystalline powder: according to Bi 0.8 Sr 0.2 Fe 0.8 Ti 0.2 O 3 The stoichiometric ratio of the initial raw material Bi is accurately weighed 2 O 3 , Fe 2 O 3 , SrCO 3 , TiO 2 , placed in an agate mortar and ground for 45 minutes to ensure uniform mixing; the resulting mixed powder was placed in an air atmosphere at 700 °C for pre-sintering for 4 hours, then re-ground, and then sintered at 820 °C in an air atmosphere for 6 hours, that is, Cubic doped bismuth ferrite polycrystalline powder can be obtained;

[0030] (2) Preparation of target material: PVA binder was added to the obtained cubic doped bismuth ferrite polycrystalline powder at a ratio of 0.05 mL / g, fully ground and pressed into tablets, and then sintered at 820 °C for 4 hours , to obtain a high-density poly...

Embodiment 2

[0040] A cubic phase doped bismuth ferrite magneto-optical material Bi 0.5 Sr 0.5 Fe 0.5 Ti 0.5O 3 The preparation method comprises the following specific steps:

[0041] (1) Preparation of polycrystalline powder: according to Bi 0.5 Sr 0.5 Fe 0.5 Ti 0.5 O 3 The stoichiometric ratio of the initial raw material Bi is accurately weighed 2 O 3 , Fe 2 O 3 , SrCO 3 , TiO 2 , placed in an agate mortar and ground for 45 minutes to ensure uniform mixing; the resulting mixed powder was placed in an air atmosphere at 700 °C for pre-sintering for 4 hours, then re-ground, and then sintered at 820 °C in an air atmosphere for 6 hours, that is, Cubic doped bismuth ferrite polycrystalline powder can be obtained;

[0042] (2) Preparation of target material: PVA binder was added to the obtained cubic doped bismuth ferrite polycrystalline powder at a ratio of 0.05 mL / g, fully ground and pressed into tablets, and then sintered at 820 °C for 4 hours , to obtain a high-density polyc...

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Abstract

The invention provides a perovskite type cubic phase doped bismuth ferrite magneto-optical material and a preparation method and application thereof. The chemical formula of the magneto-optical material is Bi1-xSrxFe1-xTixO3, wherein x is equal to 0.2-0.5. The magneto-optical material belongs to a cubic crystal system, has a space group, can be prepared by adopting a radio frequency magnetron sputtering method, and has the advantages of simple process, short period, good reproducibility and the like. The magneto-optical material obtained by the invention has the advantages of novel structure,good optical and magnetic properties, remarkable magneto-optical effect and the like, is matched with crystal lattices of silicon, and is expected to be applied in the fields of silicon-based integrated optical isolators and the like.

Description

technical field [0001] The invention belongs to the technical field of magneto-optical materials, and in particular relates to a perovskite-type cubic phase-doped bismuth ferrite magneto-optical material and a preparation method and application thereof. Background technique [0002] In the optical communication technology, a large amount of data transmission has high requirements on the anti-interference and stability of the optical fiber. It is necessary to add a magneto-optical isolator to the optical fiber or other optical devices to improve the transmission stability. Therefore, the development of magneto-optical materials with high magneto-optical properties, high stability and low transmission loss is an urgent need for the development of current communication technology. Related studies have shown that in the garnet-type magneto-optical material R 3 Fe 5 O 12 Mixed with an appropriate amount of Bi 3+ ions, due to Bi 3+ The excited state energy levels are strongly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/00C23C14/58C23C14/35C23C14/08C04B35/622C04B35/26
CPCG02F1/0036C23C14/35C23C14/088C23C14/5806C04B35/2683C04B35/622C04B2235/3232C04B2235/3215C04B2235/3213C04B2235/656C04B2235/6567
Inventor 庄乃锋林楠茜胡晓琳陈新
Owner FUZHOU UNIV
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