APS » PROLA » Phys. Rev. B » Volume 54 » Issue 18

Phys. Rev. B 54, R12665 - R12668 (1996)

Intrinsic localized spin-wave modes in antiferromagnetic chains with single-ion easy-axis anisotropy
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R. Lai, S. A. Kiselev *, and A. J. Sievers
Laboratory of Atomic and Solid State Physics and Materials Science Center, Cornell University, Ithaca, New York 14853-2501

Rapid Communication Received 15 August 1996

The dynamical properties of intrinsic localized spin-wave modes (ILSM's) in perfect antiferromagnetic chains of classical spins with on-site easy-axis anisotropy are investigated. Only ILSM's of odd parity exist below the plane-wave magnon frequency band. The degree of localization increases as either the maximum spin deviation or the ratio of the anisotropy constant to the exchange coupling constant, D / J, increases. Traveling ILSM's can also be excited; however, they become pinned for large D / J.


©1996 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v54/pR12665
DOI: 10.1103/PhysRevB.54.R12665

* Permanent address: Institute of Spectroscopy of Russian Academy of Sciences, Troitsk, Moscow 142092, Russia.

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