TY - JOUR
T1 - General features of photoinduced spin dynamics in ferromagnetic and ferrimagnetic compounds
AU - Ogasawara, T.
AU - Ohgushi, K.
AU - Tomioka, Y.
AU - Takahashi, K. S.
AU - Okamoto, H.
AU - Kawasaki, M.
AU - Tokura, Y.
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2005/3/4
Y1 - 2005/3/4
N2 - Ultrafast photoinduced spin dynamics has been investigated by time-resolved magneto-optical Kerr spectroscopy for various ferromagnetic and ferrimagnetic compounds: FeCr2S4, CoCr2S4, CuCr2Se4, CdCr2Se4, La 0.6Sr0.4MnO3, and SrRuO3. The temporal demagnetization process, which is observed commonly for all the compounds, essentially consists of two components: One is an instantaneous change which originates perhaps from multiple emissions of magnetic excitations during nonradiative decay of photoexcited carriers, and the other is a delayed response due to thermalization of the spin system. The time constant of the delayed change depends strongly on materials and is scaled with the magnetocrystalline anisotropy, indicating that spin-orbit coupling is a dominant interaction for this process.
AB - Ultrafast photoinduced spin dynamics has been investigated by time-resolved magneto-optical Kerr spectroscopy for various ferromagnetic and ferrimagnetic compounds: FeCr2S4, CoCr2S4, CuCr2Se4, CdCr2Se4, La 0.6Sr0.4MnO3, and SrRuO3. The temporal demagnetization process, which is observed commonly for all the compounds, essentially consists of two components: One is an instantaneous change which originates perhaps from multiple emissions of magnetic excitations during nonradiative decay of photoexcited carriers, and the other is a delayed response due to thermalization of the spin system. The time constant of the delayed change depends strongly on materials and is scaled with the magnetocrystalline anisotropy, indicating that spin-orbit coupling is a dominant interaction for this process.
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U2 - 10.1103/PhysRevLett.94.087202
DO - 10.1103/PhysRevLett.94.087202
M3 - Article
AN - SCOPUS:18244381543
SN - 0031-9007
VL - 94
JO - Physical Review Letters
JF - Physical Review Letters
IS - 8
M1 - 087202
ER -