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Updated: Jun 6, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

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二次元ヘテロ構造における室温上の鉄磁気制御 ヴァン・デル・ワールス インターフェイス・マグネト化学

Gaojie Zhang1,2, Hao Wu1,2, Li Yang1,2

  • 1State Key Laboratory of Material Processing and Die & Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

Journal of the American Chemical Society
|November 30, 2024
PubMed
まとめ

研究者らは,室温以上の2Dフェロマグネティズムを制御するための新しい非破壊的方法を開発しました. このヴァン・デル・ワールスのインターフェイス磁気化学戦略は,高度なスピントロニックデバイスのキュリー温度と磁気特性を高めます.

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Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Paramagnetism

Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
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