Electrical manipulation of ferromagnetic NiFe by antiferromagnetic IrMn
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
We demonstrate that an antiferromagnet can be employed for a highly efficient electrical manipulation of a ferromagnet. In our study, we use an electrical detection technique of the ferromagnetic resonance driven by an in-plane ac current in a NiFe/IrMn bilayer. At room temperature, we observe antidampinglike spin torque acting on the NiFe ferromagnet, generated by an in-plane current driven through the IrMn antiferromagnet. A large enhancement of the torque, characterized by an effective spin-Hall angle exceeding most heavy transition metals, correlates with the presence of the exchange-bias field at the NiFe/IrMn interface. It highlights that, in addition to the strong spin-orbit coupling, the antiferromagnetic order in IrMn governs the observed phenomenon.
Date Issued
2015-12-03
Date Acceptance
2015-11-09
Citation
Physical Review B, 2015, 92 (21)
ISSN
1098-0121
Publisher
American Physical Society
Journal / Book Title
Physical Review B
Volume
92
Issue
21
Copyright Statement
© 2015 American Physical Society
Subjects
cond-mat.mes-hall
cond-mat.mtrl-sci
Fluids & Plasmas
02 Physical Sciences
03 Chemical Sciences
Publication Status
Published
Article Number
214406