Increase in spin-Hall effect and influence of anomalous Nernst effect on spin-Hall magnetoresistance in β-phase and α-phase W100-xTax/CoFeB systems

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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 α-phase and β-phase by controlling the sputtering condition. We found that, in both α-phase and β-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 θ SH. Moreover, we observed the influence of anomalous Nernst effect on SMR for the high-resistive W-Ta/CoFeB systems.

Original languageEnglish
Article number053008
JournalApplied Physics Express
Volume12
Issue number5
DOIs
Publication statusPublished - 2019 May 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Increase in spin-Hall effect and influence of anomalous Nernst effect on spin-Hall magnetoresistance in β-phase and α-phase W<sub>100-x</sub>Ta<sub>x</sub>/CoFeB systems'. Together they form a unique fingerprint.

Cite this