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Optical characterization of non-local spin transfer torque acting on a single nanomagnet.

Research output: Contribution to journalJournal article

Published

  • P. Keatley
  • Atif Aziz
  • M. Ali
  • B. J. Kickey
  • M. G. Blamire
  • R. J. Kicken
Article number094421
Journal publication date21/03/2014
JournalPhysical Review B
Journal number9
Volume89
Number of pages7
Original languageEnglish

Abstract

Time-resolved scanning Kerr microscopy (TRSKM) has been used to examine the effect of nonlocal spin transfer torque (NL-STT) within a two-terminal current perpendicular-to-plane nonlocal spin valve. A combination of Oersted field and NL-STT was used to excite and control the magnetization dynamics. By comparison with a macrospin model, the strength of the NL-STT was quantified and found to be
comparable to that achieved by direct injection of spin-polarized current. The sensitivity of the magneto-optical probe to small out-of-plane deflections of the magnetization also allows the NL-STT to be quantified in quasi-dc measurements, greatly simplifying the investigation of STT phenomena.

Bibliographic note

©2014 American Physical Society