Magnetic Moment Orientation-Dependent Spin Dissipation in Antiferromagnets

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Spin interaction in antiferromagnetic materials is of central interest in the recently emerging antiferromagnetic spintronics. In this Letter, we explore the spin current interaction in antiferromagnetic FeMn by the spin pumping effect. Exchange biased FeNi/FeMn films, in which the Neel vector can be presumably controlled via the exchange spring effect, are employed to investigate the damping enhancement depending on the relative orientation between the Neel vector and the polarization of the pumped spin current. The correlation between the enhanced damping and the strength of the exchange bias suggests that the twisting of the Neel vector induces an additional spin dissipation, which verifies that the Slonczewski-type spin torque is effective even in antiferromagnetic materials.
Publisher
AMER PHYSICAL SOC
Issue Date
2017-12
Language
English
Article Type
Article
Keywords

ROOM-TEMPERATURE; FILMS; MODEL

Citation

PHYSICAL REVIEW LETTERS, v.119, pp.267204

ISSN
0031-9007
DOI
10.1103/PhysRevLett.119.267204
URI
http://hdl.handle.net/10203/240170
Appears in Collection
PH-Journal Papers(저널논문)
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