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Superlattice material as well as preparation method and application thereof

A superlattice and two-dimensional material technology, applied in the growth of polycrystalline materials, the application of conductive/insulating/magnetic materials on magnetic films, chemical instruments and methods, etc., can solve the problem of miniaturization and low power consumption that are difficult to meet Storage application requirements and other issues

Active Publication Date: 2019-07-19
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of magneto-optical information storage technology, traditional information storage materials and device architectures have been difficult to meet the requirements of miniaturization and low power consumption storage applications

Method used

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  • Superlattice material as well as preparation method and application thereof
  • Superlattice material as well as preparation method and application thereof
  • Superlattice material as well as preparation method and application thereof

Examples

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preparation example Construction

[0037] The present invention also provides a method for preparing the superlattice material described in the above technical solution, comprising the following steps:

[0038] The first ferrimagnetic thin film, the two-dimensional material layer and the second ferrimagnetic thin film are sequentially stacked and grown on the substrate to obtain a superlattice material.

[0039] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0040] In the present invention, the substrate is preferably pretreated before growing the first ferrimagnetic thin film; the pretreatment is preferably cleaned with acetone, alcohol and deionized water in sequence; the cleaning It is carried out under ultrasonic conditions; the present invention does not have any special limitation on the ultrasonic conditions.

[0041] In the present invention, the method for growing the first ferrimagnetic th...

Embodiment 1

[0063] A superlattice material: the substrate material is a gadolinium gallium garnet (GGG) single crystal substrate, the material of the first ferrimagnetic thin film is yttrium iron garnet (YIG) (60nm), and the material of the two-dimensional material layer is Monolayer graphene, the material of the second ferrimagnetic film is yttrium iron garnet (YIG) (60nm);

[0064] Preparation:

[0065] 1) Use acetone, alcohol and deionized water in sequence to clean the substrate material under ultrasonic conditions;

[0066] 2) Put the substrate in the pulsed laser deposition chamber, and set the target base distance (7cm); at ≤10 -6 In a vacuum environment of Pa, heat the substrate to 750°C at a heating rate of 10°C / min; inject oxygen into the cavity (atmospheric pressure of 1.0Pa); then, turn on and set the laser parameters (laser energy is 300mJ; The laser frequency is 5 Hz); open the substrate baffle, deposit for 20 minutes, close the substrate baffle after the deposition is com...

Embodiment 2

[0073] A superlattice material: the substrate material is a gadolinium gallium garnet (GGG) single crystal substrate, the material of the first ferrimagnetic film is thulium iron garnet (TmIG) (60nm), and the material of the two-dimensional material layer is Monolayer graphene, the material of the second ferrimagnetic film is thulium iron garnet (TmIG) (60nm);

[0074] The preparation method refers to Example 1.

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Abstract

The invention relates to the technical field of superlattice magneto-optical materials, in particular to a superlattice material as well as a preparation method and application thereof. According to the record of an embodiment, the superlattice material provided by the invention has both the relatively good magnetic property of a ferrous garnet material and the good photoelectric absorption property of graphene and other two-dimensional semiconductor materials; magneto-optical Kerr effect data acquired through testing indicate that the magneto-optical Kerr angle of the superlattice material ina magnetic field of 2500 Oe reaches 13 mdeg; and compared with a non-superlattice ferrous magnetic thin film material without the insertion of a two-dimensional material, the superlattice material has the advantages that the magneto-optical Kerr angle is increased by 2.5 times and the magneto-optical effect is enhanced.

Description

technical field [0001] The invention relates to the technical field of superlattice magneto-optical materials, in particular to a superlattice material and its preparation method and application. Background technique [0002] With the development of magneto-optical information storage technology, traditional information storage materials and device architectures have been difficult to meet the requirements of miniaturization and low power consumption storage applications. The study of the magneto-optic effect found that the electromagnetic properties of substances with inherent magnetic moments will change under the action of an external magnetic field, which will change the transmission characteristics of light waves inside. The degree of freedom of light determines the two It can be used as an information carrier and has the characteristics of low energy consumption, high sensitivity and quantized transport. Therefore, the interaction of light and matter is an important s...

Claims

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Application Information

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IPC IPC(8): C23C14/28C30B19/12C23C14/08C30B23/02C23C14/35
CPCC23C14/0036C23C14/08C23C14/28C30B19/12C30B23/025G02F1/091G11B11/10584G11B11/10593H01F10/3209H01F41/302C23C14/083C23C14/085C30B29/46G11B11/105H01F10/28H01F10/30H01F10/3245H01F10/3254H01F41/32
Inventor 金立川贾侃成张岱南张怀武钟智勇杨青慧唐晓莉白飞明
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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