Damping of Standing Spin Waves in Bismuth-Substituted Yttrium Iron Garnet as Seen via the Time-Resolved Magneto-Optical Kerr Effect - Université de Lorraine Access content directly
Journal Articles Physical Review Applied Year : 2019

Damping of Standing Spin Waves in Bismuth-Substituted Yttrium Iron Garnet as Seen via the Time-Resolved Magneto-Optical Kerr Effect

Elena Popova
Michel Hehn
Niels Keller
S. Petit-Watelot
Stéphane Mangin
Grégory Malinowski

Abstract

We investigate spin-wave resonance modes and their damping in insulating thin films of bismuth-substituted yttrium iron garnet by performing femtosecond magneto-optical pump-probe experiments. For large magnetic fields in the range below the magnetization saturation, we find that the damping of high-order standing spin-wave (SSW) modes is about 40 times lower than that for the fundamental one. The observed phenomenon can be explained by considering different features of magnetic anisotropy and exchange fields that, respectively, define the precession frequency for fundamental and high-order SSWs. These results provide further insight into SSWs in iron garnets and may be exploited in many new photomagnonic devices.
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Dates and versions

hal-02337703 , version 1 (29-10-2019)

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Marwan Deb, Elena Popova, Michel Hehn, Niels Keller, S. Petit-Watelot, et al.. Damping of Standing Spin Waves in Bismuth-Substituted Yttrium Iron Garnet as Seen via the Time-Resolved Magneto-Optical Kerr Effect. Physical Review Applied, 2019, 12 (4), ⟨10.1103/PhysRevApplied.12.044006⟩. ⟨hal-02337703⟩
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