Optical characterization of nonlocal spin transfer torque acting on a single nanomagnet
Keatley, Paul Steven; Aziz, A; Ali, M.; et al.Hickey, B.J.; Blamire, MG; Hicken, R.J.
Date: 21 March 2014
Article
Journal
Physical Review B - Condensed Matter and Materials Physics
Publisher
American Physical Society
Publisher DOI
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, ...
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. © 2014 American Physical Society.
Physics and Astronomy
Faculty of Environment, Science and Economy
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