A spintronic device and preparation method for realizing visible light-controlled interfacial magnetism

A spintronic device, visible light technology, applied in field-controlled resistors, parts of electromagnetic equipment, manufacturing/processing of electromagnetic devices, etc. question

Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Spintronics has played a very important role in the miniaturization, economy and efficiency of electronic equipment, but spintronics devices that are regulated by current or voltage are limited by many practical factors, such as the limitation of the power supply network. This kind of regulation is also unsustainable in future Mars colonization or space travel. Today, people use solar photovoltaic spintronics devices to overcome the above limitations
[0003] The disadvantages of the above-mentioned solar photovoltaic spintronics devices are: all existing optically controlled interfacial magnetism relies on the mutual coupling of photons and electron spins, that is, using circularly polarized femtosecond laser pulses, this method will produce laser-induced heating , its temperature is close to the Curie temperature, which will lead to photomagnetic instability, high energy consumption, and affect adjacent magnetic domains

Method used

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  • A spintronic device and preparation method for realizing visible light-controlled interfacial magnetism
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  • A spintronic device and preparation method for realizing visible light-controlled interfacial magnetism

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preparation example Construction

[0037] A method for preparing a spintronic device capable of controlling interfacial magnetism by visible light, comprising the following steps:

[0038] 1) setting the bottom electrode on the substrate;

[0039] 2) setting a magnetic layer on the bottom electrode;

[0040] 3) disposing the active layer solution on the magnetic layer;

[0041] 4) A layer of top electrode is arranged on the active layer.

[0042] The thickness of the bottom electrode is 3nm-8nm, the thickness of the magnetic layer is 0.5nm-20nm, the atmosphere is air, the thickness of the film is controlled by a quartz crystal microbalance during the preparation process, and no in-situ annealing treatment is performed after the preparation.

[0043] The organic active layer is a polymer solution in which the ratio of donor to acceptor is 1:1 to 1:5 and the concentration is 5 to 20 mg·mL -1 , the solvent is a mixed solution of 1,8-diiodooctane and o-xylene, wherein the volume fraction of 1,8-diiodooctane is 1...

Embodiment 1

[0048] A method for preparing a spintronic device capable of controlling interfacial magnetism by visible light, comprising the following steps:

[0049] Step 1: Using Si / SiO 2 As the substrate, a Ta film was deposited on the substrate by DC magnetron sputtering at room temperature, and Ta was used as the bottom electrode.

[0050] The specific process is: the thickness is 5nm.

[0051] Step 2: using a DC magnetron sputtering method to deposit a Co thin film on Ta at room temperature, and the Co thin film is used as a magnetic layer.

[0052] The specific process is: the thickness is 0.9nm.

[0053] Step 3: Using PTB7-Th and PC71BM polymer solutions, the organic active layer was spin-coated onto Si / SiO using a DC magnetron sputtering method at room temperature 2 / Ta / Co on.

[0054] The specific polymer solution process is: 1) The solvent is a mixed solution of 1,8-diiodooctane and o-xylene, wherein the volume fraction of 1,8-diiodooctane is 3%; 2) The donor and acceptor T...

Embodiment 2

[0059] The difference between this embodiment and Embodiment 1 is that the thickness of Co is 1 nm, and the rest are the same as Embodiment 1.

[0060] The basic principle of this embodiment is the same as that of Embodiment 1, changing the thickness of the Co layer will change its shape anisotropy and charge density, thereby changing the control of the interfacial magnetism.

[0061] For the SiO prepared by the above-mentioned embodiment 2 / Si / Ta / Co / PTB7-Th: PC71BM / Pt photovoltaic spintronic devices are tested, the simulated light source is 1.5 times the solar power density, and the test results are as follows Figure 4 shown.

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Abstract

The invention relates to a spin-electron device capable of realizing regulation and control of interfacial magnetism by visible light. The spin-electron device comprises a substrate, a bottom electrode, a magnetic layer, an active layer and a top electrode. The bottom electrode is arranged on the upper surface of the substrate, the magnetic layer is arranged on the upper surface of the bottom electrode, the active layer is arranged on the upper surface of the magnetic layer, and the top electrode is arranged on the upper surface of the active layer. The active layer includes donors and receptors. According to the spin-electron device capable of realizing regulation and control of the interfacial magnetism by the visible light, light-electricity-magnetism triple-coupled organic semiconductor solar cell / ferromagnet heterojunction is used rather than simply regulating and controlling the interfacial magnetism by ionic liquid, no chemical reaction or corrosion problem exists, and the problems of unstable light-control magnetism and high energy consumption of an existing solar photovoltaic spin-electron device are solved.

Description

technical field [0001] The invention belongs to the technical field of spintronics devices, and in particular relates to a spintronics device and a preparation method for realizing visible light-regulated interfacial magnetism. Background technique [0002] Spintronics has played a very important role in the miniaturization, economy and efficiency of electronic equipment, but spintronics devices that are regulated by current or voltage are limited by many practical factors, such as the limitation of the power supply network. Such regulation is also unsustainable in future Mars colonization or space travel. Today, solar photovoltaic spintronics devices are used to overcome the above limitations. [0003] The disadvantages of the above-mentioned solar photovoltaic spintronics devices are: all existing optically controlled interfacial magnetism relies on the mutual coupling of photons and electron spins, that is, using circularly polarized femtosecond laser pulses, this method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L43/02H01L43/08H01L43/10H01L43/12
Inventor 刘明周子尧胡忠强赵一凡彭晚军赵士舜
Owner XI AN JIAOTONG UNIV
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