New technique for excitation of bulk and surface spin waves in ferromagnets

S. A. Bogacz*, John B Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

A meander-line magnetic transducer is discussed in the context of bulk and surface spin-wave generation in ferromagnets. The magnetic field created by the transducer was calculated in closed analytic form for this model. The linear response of the ferromagnet to the inhomogenous surface disturbance of arbitrary ω and k was obtained as a self-consistent solution to the Bloch equation of motion and the Maxwell equations, subject to appropriate boundary condition. In particular, the energy flux through the boundary displays a sharp resonantlike absorption maximum concentrated at the frequency of the magnetostatic Damon-Eshbach (DE) surface mode; furthermore, the energy transfer spectrum is cut off abruptly below the threshold frequency of the bulk spin waves. The application of the meander line to the spin diffusion problem in NMR is also discussed.

Original languageEnglish (US)
Pages (from-to)1935-1942
Number of pages8
JournalJournal of Applied Physics
Volume58
Issue number5
DOIs
StatePublished - Dec 1 1985

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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