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

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...

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Published in:Physical review applied 2019-10, Vol.12 (4), Article 044006
Main Authors: Deb, Marwan, Popova, Elena, Hehn, Michel, Keller, Niels, Petit-Watelot, Sébastien, Bargheer, Matias, Mangin, Stéphane, Malinowski, Gregory
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Physics
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cited_by cdi_FETCH-LOGICAL-c409t-7e8eefe15453564115e4bdc96b6750f150f99ae1070f2ac14af49c7594a4857f3
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container_issue 4
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container_title Physical review applied
container_volume 12
creator Deb, Marwan
Popova, Elena
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Petit-Watelot, Sébastien
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Mangin, Stéphane
Malinowski, Gregory
description 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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title Damping of Standing Spin Waves in Bismuth-Substituted Yttrium Iron Garnet as Seen via the Time-Resolved Magneto-Optical Kerr Effect
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