Magnetic structures in the locally inverted interlayer coupling region of a bilayer magnetic system

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:501

Article

Lee, Chanki^1,2  Kwon, Hee Young¹  Kim, Nam Jun¹  Yoon, Han Gyu¹  Song, Chiho¹  Lee, Doo Bong¹  Choi, Jun Woo²  Son, Young-Woo³  Won, Changyeon¹ 

[1] Kyung Hee Univ, Dept Phys, Seoul 02447, South Korea

[2] Korea Inst Sci & Technol, Ctr Spintron, Seoul 02792, South Korea

[3] Korea Inst Adv Study, Ctr Adv Computat, Seoul 02455, South Korea

关键词: Magnetic domain;    Spatially varying interlayer coupling;    Locally inverted interlayer coupling;    2D magnetic van der Waals materials;    Moire magnetism;   

DOI  :  10.1016/j.jmmm.2020.166447

来源: Elsevier

【 摘 要 】

We use a Monte Carlo simulation to investigate the magnetic structures in a bilayer magnetic system containing a locally inverted interlayer coupling region. The stabilization of multiple magnetic structures, including the magnetic skyrmion, is possible in the locally inverted interlayer coupling region. Various factors such as the region area, anisotropy, interlayer coupling strength, and exchange coupling strength affect the properties of the structures, including their size and chirality. We obtain conditions for the stabilization and transitions of these magnetic structures. The Dzyaloshinskii-Moriya interaction (DMI) and dipolar interaction play prominent roles as they significantly enhance the formation and stability of the structures. An asymmetric feature can arise from the broken inversion symmetry in the structure formation, yielding an interfacial DMI, which stabilizes the skyrmion. It is demonstrated that the dipole interaction also acts as an effective interfacial DMI in the system.

【 授权许可】

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