Spin Seebeck coefficient enhancement by using Ta50W50 alloy and YIG/Ru interface

Hiromi Yuasa, Fumiya Nakata, Ryohei Nakamura, Yuichiro Kurokawa

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This paper reports that Ta50W50 alloy has a higher spin Hall angle than that of β-W by measuring the spin Seebeck coefficients for Fe5Y3O12 (YIG)/Ru/Ta50W50 and YIG/Ru/W systems. The spin Seebeck coefficient increased by inserting Ru, and the YIG/Ru/Ta50W50 system achieved 2.4 times the magnitude of spin Seebeck coefficient of the conventional YIG/Pt system although Ru and Ta50W50 have spin Hall angles with opposite signs. Ru seems to recover the spin mixing conductance that is decreased by Ta-W oxidation at its interface with YIG. To enhance the spin Seebeck coefficient, materials having a high spin Hall angle can be combined with materials having a high spin mixing conductance.

Original languageEnglish
Article number134002
JournalJournal of Physics D: Applied Physics
Volume51
Issue number13
DOIs
Publication statusPublished - Mar 7 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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