Local excitation of magnetostatic modes in YIG

Elisa Papa, Stewart Barnes, Jean Philippe Ansermet

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Described are ferromagnetic resonance (FMR) studies of the long wavelength magnetostatic wave modes of a single crystal yttrium iron garnet (YIG) slab magnetized by an in-plane field. A resonant circuit comprising a coil, 50 μ in diameter, is used to excite and detect the YIG microwave absorption spectrum. By changing its orientation and position over the sample surface it is possible to excite selectively different series of magnetostatic modes. The observed resonance fields are in good agreement with those calculated numerically from the Damon-Eshbach dispersion relation. The effect of heat currents on the magnetization dynamics in insulating magnets is explored. For a YIG crystal 10 mm in length, 2 mm in width and 25 micrometers in thickness, a temperature gradient of about 20 K/cm is sufficient to suppress the high-order longitudinal magnetostatic modes.

Original languageEnglish (US)
Article number6466525
Pages (from-to)1055-1059
Number of pages5
JournalIEEE Transactions on Magnetics
Volume49
Issue number3
DOIs
StatePublished - 2013

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Keywords

  • Ferromagnetic resonance (FMR)
  • magnetostatic modes
  • spin caloritronics
  • yttrium iron garnet (YIG)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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