Journal
APPLIED PHYSICS EXPRESS
Volume 12, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/1882-0786/ab1a66
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Funding
- Open Innovation Platform with Enterprises, Research Institute and Academia (OPERA), JST
- JSPS KAKENHI [15H05699, 19H00844]
- Grants-in-Aid for Scientific Research [19H00844] Funding Source: KAKEN
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We studied the spin-Hall effect in W100-xTax with various Ta compositions for W-Ta alloy/CoFeB/MgO heterostructures by means of spin-Hall magnetoresistance (SMR). We synthesized W-Ta alloys with both alpha-phase and beta-phase by controlling the sputtering condition. We found that, in both alpha-phase and beta-phase W-Ta alloys, the amplitude in SMR signals increases by alloying W with Ta at certain x. The analysis based on the drift-diffusion model reveals that the increase in SMR originates from an enhancement of the spin-Hall angles theta(SH). Moreover, we observed the influence of anomalous Nernst effect on SMR for the high-resistive W-Ta/CoFeB systems. (C) 2019 The Japan Society of Applied Physics
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