TY - JOUR
T1 - Band-structure-dependent demagnetization in the Heusler alloy Co 2Mn1-xFexSi
AU - Steil, Daniel
AU - Alebrand, Sabine
AU - Roth, Tobias
AU - Krauß, Michael
AU - Kubota, Takahide
AU - Oogane, Mikihiko
AU - Ando, Yasuo
AU - Schneider, Hans Christian
AU - Aeschlimann, Martin
AU - Cinchetti, Mirko
PY - 2010/11/15
Y1 - 2010/11/15
N2 - We investigate the ultrafast demagnetization for two Heusler alloys (Co2Mn1-xFexSi) with a different lineup of the minority band gap and the Fermi level. Even though electronic spin-flip transitions are partially blocked by the band gap in one compound, the respective magnetization dynamics, as measured by the time-resolved Kerr effect, are remarkably similar. Based on a dynamical model that includes momentum and spin-dependent carrier scattering, we show that the magnetization dynamics are dominated by hole spin-flip processes, which are not influenced by the gap.
AB - We investigate the ultrafast demagnetization for two Heusler alloys (Co2Mn1-xFexSi) with a different lineup of the minority band gap and the Fermi level. Even though electronic spin-flip transitions are partially blocked by the band gap in one compound, the respective magnetization dynamics, as measured by the time-resolved Kerr effect, are remarkably similar. Based on a dynamical model that includes momentum and spin-dependent carrier scattering, we show that the magnetization dynamics are dominated by hole spin-flip processes, which are not influenced by the gap.
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U2 - 10.1103/PhysRevLett.105.217202
DO - 10.1103/PhysRevLett.105.217202
M3 - Article
AN - SCOPUS:78549270105
SN - 0031-9007
VL - 105
JO - Physical Review Letters
JF - Physical Review Letters
IS - 21
M1 - 217202
ER -