Spin-orbit torques in asymmetric Pt/Co/Pt structures

Hongyu An, Hiroyasu Nakayama, Yusuke Kanno, Akiyo Nomura, Satoshi Haku, Kazuya Ando

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We have studied the generation of spin-orbit torques in Pt/Co/Pt trilayers fabricated on Gd3Ga5O12 (GGG) and commonly used SiO2 substrates. By fabricating Pt/Co/Pt trilayers with symmetric thicknesses of the top and bottom Pt layers, it has been confirmed that complete cancellation of both fieldlike and dampinglike torques can be obtained on the GGG substrate. However, the spin-orbit torques cannot be completely canceled out on the SiO2 substrate, which suggests that a GGG substrate is more suitable for precise measurements of the spin-orbit torques. We have also fabricated asymmetric Pt/Co/Pt trilayers on a GGG substrate to generate nonzero spin-orbit torques, and a relatively strong dampinglike torque has been measured accompanied with a fieldlike torque which is about four times smaller. Furthermore, by conducting the vector measurements of the spin-orbit torques from 300 to 10 K, it has been found that the dampinglike torque only slightly varies with temperatures.

Original languageEnglish
Article number214417
JournalPhysical Review B
Volume94
Issue number21
DOIs
Publication statusPublished - 2016 Dec 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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