Experimental Generation and Observation of Intrinsic Localized Spin Wave Modes in an Antiferromagnet

U. T. Schwarz; L. Q. English; A. J. Sievers

doi:10.1103/PhysRevLett.83.223

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Experimental Generation and Observation of Intrinsic Localized Spin Wave Modes in an Antiferromagnet

U. T. Schwarz, L. Q. English, and A. J. Sievers

Phys. Rev. Lett. 83, 223 – Published 5 July 1999

Abstract

By driving with a microwave pulse the lowest frequency antiferromagnetic resonance of the quasi-1D biaxial antiferromagnet $(C_{2} H_{5} {NH}_{3})_{2} {CuCl}_{4}$ into an unstable region, intrinsic localized spin waves have been generated and detected in the spin wave gap. These findings are consistent with the prediction that nonlinearity plus lattice discreteness can lead to localized excitations with dimensions comparable to the lattice constant.

Received 9 April 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.223

Authors & Affiliations

U. T. Schwarz, L. Q. English, and A. J. Sievers

Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501

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Vol. 83, Iss. 1 — 5 July 1999

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Experimental Generation and Observation of Intrinsic Localized Spin Wave Modes in an Antiferromagnet

U. T. Schwarz, L. Q. English, and A. J. Sievers

Phys. Rev. Lett. 83, 223 – Published 5 July 1999

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