Interfacial Dzyaloshinskii-Moriya Interaction: Effect of 5d Band Filling and Correlation with Spin Mixing Conductance

Physical Review Letters
Xin MaXiaoqin Li

Abstract

The Dzyaloshinskii-Moriya interaction (DMI) at the heavy metal (HM) and ferromagnetic metal (FM) interface has been recognized as a key ingredient in spintronic applications. Here we investigate the chemical trend of DMI on the 5d band filling (5d^{3}-5d^{10}) of the HM element in HM/FM (FM=CoFeB,Co)/MgO multilayer thin films. DMI is quantitatively evaluated by measuring asymmetric spin wave dispersion using Brillouin light scattering. Sign reversal and 20 times modification of the DMI coefficient D have been measured as the 5d HM element is varied. The chemical trend can be qualitatively understood by considering the 5d and 3d bands alignment at the HM/FM interface and the subsequent orbital hybridization around the Fermi level. Furthermore, a correlation is observed between DMI and effective spin mixing conductance at the HM/FM interfaces. Our results provide new insights into the interfacial DMI for designing future spintronic devices.

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Citations

Nov 18, 2018·Scientific Reports·Alexander G KolesnikovAlexey V Ognev
Sep 7, 2019·Physical Review Letters·Lijun ZhuRobert A Buhrman
Feb 9, 2019·Advanced Materials·Wenjing LiGisela Schütz
Nov 9, 2019·Physical Review Letters·Juriaan LucassenRembert A Duine
Jun 6, 2020·Physical Review Letters·Mariëlle J MeijerRembert A Duine
Sep 12, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·I Benguettat-El MokhtariM Belmeguenai
Jan 1, 2019·Physical Review. B·Kowsar ShahbaziChristopher H Marrows
Jun 2, 2021·Physical Chemistry Chemical Physics : PCCP·Yu ZhangZongzhi Zhang

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