Local excitation of magnetostatic modes in YIG

Elisa Papa; Stewart E. Barnes; Jean Philippe Ansermet

doi:10.1109/TMAG.2012.2229386

Local excitation of magnetostatic modes in YIG

Elisa Papa, Stewart E. Barnes, Jean Philippe Ansermet

Physics

Research output: Contribution to journal › Article › peer-review

6 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 language	English (US)
Article number	6466525
Pages (from-to)	1055-1059
Number of pages	5
Journal	IEEE Transactions on Magnetics
Volume	49
Issue number	3
DOIs	https://doi.org/10.1109/TMAG.2012.2229386
State	Published - 2013

Keywords

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

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "Local excitation of magnetostatic modes in YIG",

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.",

keywords = "Ferromagnetic resonance (FMR), magnetostatic modes, spin caloritronics, yttrium iron garnet (YIG)",

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AU - Papa, Elisa

AU - Barnes, Stewart E.

AU - Ansermet, Jean Philippe

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AB - 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.

KW - Ferromagnetic resonance (FMR)

KW - magnetostatic modes

KW - spin caloritronics

KW - yttrium iron garnet (YIG)

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