Interfacial Dzyaloshinskii-Moriya interaction and dampinglike spin-orbit torque in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mo>[</mml:mo><mml:mrow><mml:mi>Co</mml:mi><mml:mo>/</mml:mo><mml:mi>Gd</mml:mi><mml:mo>/</mml:mo><mml:mi>Pt</mml:mi></mml:mrow><mml:mo>]</mml:mo></mml:mrow><mml:mi>N</mml:mi></mml:msub></mml:math> magnetic multilayers

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Description

Recently, magnetic multilayer systems have received again a great attention owing to their suitability for the generation of magnetic chiral spin structure. In this study, we experimentally investigated the interfacial Dzyaloshisnkii-Moriaya interaction (DMI) and the spin-Hall angle (SHA) of magnetic Co/Gd/Pt multilayers with respect to the repetition number $N$ of the multilayers. The DMI and SHA are important variables that govern the stability and mobility of a homochiral spin structure, respectively. The experimental results show that the ratio between the DMI and the dipole energy from the domain wall gradually decreases as $N$ increases, which is expected to be hard to achieve homochiral spin structure for larger $N$ and the values of SHA remain constant irrespective of $N$. The observed SHA invariance indicates that the Pt layers in repetition have a negligible effect on the SHA.

Journal

  • Physical Review B

    Physical Review B 103 (10), 2021-03-04

    American Physical Society (APS)

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