Unidirectional propagation of magnetostatic surface spin waves at a magnetic film surface

Kin L. Wong, Lei Bi, Mingqiang Bao, Qiye Wen, Jean Pierre Chatelon, Yen Ting Lin, C. A. Ross, Huaiwu Zhang, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

An analytical expression for the amplitudes of magnetostatic surface spin waves (MSSWs) propagating in opposite directions at a magnetic film surface is presented. This shows that for a given magnetic field H, it is forbidden for an independent MSSW to propagate along the direction of -H X n, where n is the surface normal. This unidirectional propagation property is confirmed by experiments with both permalloy and iron garnet films of different film thicknesses, and has implications in the design of spin-wave devices such as isolators and spin-wave diodes.

Original languageEnglish
Article number232403
JournalApplied Physics Letters
Volume105
Issue number23
DOIs
Publication statusPublished - 2014 Dec 8

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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