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

Ma, Xin; Yu, Guoqiang; Tang, Chi; Li, Xiang; He, Congli; Shi, Jing; Wang, Kang L.; Li, Xiaoqin

doi:10.1103/PhysRevLett.120.157204

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

Journal Article · Fri Apr 13 00:00:00 EDT 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.120.157204· OSTI ID:1470356

Ma, Xin ^[1]; Yu, Guoqiang ^[2]; Tang, Chi ^[3]; Li, Xiang ^[4]; He, Congli ^[4]; Shi, Jing ^[3]; Wang, Kang L. ^[4]; Li, Xiaoqin ^[5]

Univ. of Texas, Austin, TX (United States); Univ. of California, Santa Barbara, CA (United States)
Univ. of California, Los Angeles, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
Univ. of California, Riverside, CA (United States)
Univ. of California, Los Angeles, CA (United States)
Univ. of Texas, Austin, TX (United States)

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 ($$\mathrm{FM = CoFeB, Co)/MgO}$$ 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. Finally, our results provide new insights into the interfacial DMI for designing future spintronic devices.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012670

OSTI ID:: 1470356

Alternate ID(s):: OSTI ID: 1433025

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 120; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
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Interfacial Dzyaloshinskii-Moriya Interaction: Effect of $5d$ Band Filling and Correlation with Spin Mixing Conductance

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