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Thickness- and temperature-dependent magnetodynamic properties of yttrium iron garnet thin films
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2015 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 117, no 17, 17D119Article in journal (Refereed) Published
Abstract [en]

The magnetodynamical properties of nanometer-thick yttrium iron garnet films are studied using ferromagnetic resonance as a function of temperature. The films were grown on gadolinium gallium garnet substrates by pulsed laser deposition. First, we found that the damping coefficient increases as the temperature increases for different film thicknesses. Second, we found two different dependencies of the damping on film thickness: at room temperature, the damping coefficient increases as the film thickness decreases, while at T = 8 K, we find the damping to depend only weakly on the thickness. We attribute this behavior to an enhancement of the relaxation of the magnetization by impurities or defects at the surfaces.

Place, publisher, year, edition, pages
2015. Vol. 117, no 17, 17D119
Keyword [en]
Damping, Film thickness, Gallium alloys, Pulsed laser deposition, Yttrium, Yttrium alloys, Yttrium compounds, Damping coefficients, Gadolinium gallium garnets, Magnetodynamics, Room temperature, Temperature dependent, Temperature increase, Yttrium iron garnet films, Yttrium iron garnets
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URN: urn:nbn:se:kth:diva-166934DOI: 10.1063/1.4914363ISI: 000354984100342ScopusID: 2-s2.0-84924859646OAI: diva2:818547
Swedish Foundation for Strategic Research Swedish Research CouncilKnut and Alice Wallenberg FoundationEU, European Research Council, 307144 "MUSTANG"

QC 20150609

Available from: 2015-06-09 Created: 2015-05-21 Last updated: 2015-08-17Bibliographically approved

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Khartsev, SergiyÅkerman, Johan
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Integrated Devices and CircuitsMaterial Physics, MF
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