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

Keatley, P. and Aziz, Atif and Ali, M. and Kickey, B. J. and Blamire, M. G. and Kicken, R. J. (2014) Optical characterization of non-local spin transfer torque acting on a single nanomagnet. Physical review B, 89 (9). ISSN 1098-0121

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
©2014 American Physical Society
ID Code:
68967
Deposited By:
Deposited On:
25 Mar 2014 08:58
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Nov 2020 02:36