Fast magnetization precession observed in L 10 -FePt epitaxial thin film

S. Mizukami, S. Iihama, N. Inami, T. Hiratsuka, G. Kim, H. Naganuma, M. Oogane, Y. Ando

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Fast magnetization precession is observed in L 10 -FePt alloy epitaxial thin films excited and detected by all-optical means. The precession frequency varies from 45 to 65 GHz depending on the applied magnetic field strength and direction, which can be explained by a uniform precession model taking account of first- and second-order uniaxial magnetic anisotropy. The lowest effective Gilbert damping constant has a minimum value of 0.055, which is about half that in Co/Pt multilayers and is comparable to Ni/Co multilayers with perpendicular magnetic anisotropy.

Original languageEnglish
Article number052501
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 2011 Jan 31


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