Journal
PHYSICS LETTERS A
Volume 382, Issue 28, Pages 1890-1895Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2018.04.054
Keywords
Spin torque; Spin transfer nano-oscillator; LLGS equation; PT-symmetry; Spin excitations
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Funding
- NASI Senior Scientist Platinum Jubilee Fellowship [NAS 69/5/2016-17]
- DST-SERB Distinguished Fellowship [SERB/F/6717/2017-18]
- Council of Scientific and Industrial Research, India [03/1331/15/EMR-II]
- National Board for Higher Mathematics research project [2/48(5)/2015/NBHM(R.P.)/RD II/14127]
- U.S. Department of Energy
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We obtain the exact one-spin intrinsic localized excitation in an anisotropic Heisenberg ferromagnetic spin chain in a constant/variable external magnetic field with Gilbert damping included. We also point out how an appropriate magnitude spin current term in a spin transfer nano-oscillator (STNO) can stabilize the tendency towards damping. Further, we show how this excitation can be sustained in a recently suggested PT-symmetric magnetic nanostructure. We also briefly consider more general spin excitations. (C) 2018 Elsevier B.V. All rights reserved.
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