Band-Structure-Dependent Demagnetization in the Heusler Alloy Co 2 Mn 1 − x Fe x Si
作者： Daniel Steil , Sabine Alebrand , Tobias Roth , Michael Krauß , Takahide Kubota
DOI: 10.1103/PHYSREVLETT.105.217202
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摘要: We investigate the ultrafast demagnetization for two Heusler alloys (Co 2 Mn 1-x Fe x Si) with a different lineup of minority band gap and Fermi level. Even though electronic spin-flip transitions are partially blocked by in one compound, respective magnetization dynamics, as measured time-resolved Kerr effect, remarkably similar. Based on dynamical model that includes momentum spin-dependent carrier scattering, we show dynamics dominated hole processes, which not influenced gap.
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E. Beaurepaire, J.-C. Merle, A. Daunois, J.-Y. Bigot, Ultrafast spin dynamics in ferromagnetic nickel. Physical Review Letters. ,vol. 76, pp. 4250- 4253 ,(1996) , 10.1103/PHYSREVLETT.76.4250
M. Cinchetti, M. Sánchez Albaneda, D. Hoffmann, T. Roth, J.-P. Wüstenberg, M. Krauß, O. Andreyev, H. C. Schneider, M. Bauer, M. Aeschlimann, Spin-flip processes and ultrafast magnetization dynamics in Co: Unifying the microscopic and macroscopic view of femtosecond magnetism. Physical Review Letters. ,vol. 97, pp. 177201- ,(2006) , 10.1103/PHYSREVLETT.97.177201
E. Carpene, E. Mancini, C. Dallera, M. Brenna, E. Puppin, S. De Silvestri, Dynamics of electron-magnon interaction and ultrafast demagnetization in thin iron films Physical Review B. ,vol. 78, pp. 174422- ,(2008) , 10.1103/PHYSREVB.78.174422
C. Stamm, T. Kachel, N. Pontius, R. Mitzner, T. Quast, K. Holldack, S. Khan, C. Lupulescu, E. F. Aziz, M. Wietstruk, H. A. Dürr, W. Eberhardt, Femtosecond modification of electron localization and transfer of angular momentum in nickel. Nature Materials. ,vol. 6, pp. 740- 743 ,(2007) , 10.1038/NMAT1985
H.-S. Rhie, H. A. Dürr, W. Eberhardt, Femtosecond electron and spin dynamics in Ni/W(110) films. Physical Review Letters. ,vol. 90, pp. 247201- ,(2003) , 10.1103/PHYSREVLETT.90.247201
B. Koopmans, H.H.J.E. Kicken, M. van Kampen, W.J.M. de Jonge, Microscopic model for femtosecond magnetization dynamics Journal of Magnetism and Magnetic Materials. ,vol. 286, pp. 271- 275 ,(2005) , 10.1016/J.JMMM.2004.09.079
G. P. Zhang, W. Hübner, Laser-induced ultrafast demagnetization in ferromagnetic metals. Physical Review Letters. ,vol. 85, pp. 3025- 3028 ,(2000) , 10.1103/PHYSREVLETT.85.3025
D. Steiauf, M. Fähnle, Elliott-Yafet mechanism and the discussion of femtosecond magnetization dynamics Physical Review B. ,vol. 79, pp. 140401- ,(2009) , 10.1103/PHYSREVB.79.140401
Michael Krauß, Tobias Roth, Sabine Alebrand, Daniel Steil, Mirko Cinchetti, Martin Aeschlimann, Hans Christian Schneider, Ultrafast demagnetization of ferromagnetic transition metals: The role of the Coulomb interaction Physical Review B. ,vol. 80, pp. 180407- ,(2009) , 10.1103/PHYSREVB.80.180407
D. Steiauf, C. Illg, M. Fähnle, Extension of Yafet's theory of spin relaxation to ferromagnets Journal of Magnetism and Magnetic Materials. ,vol. 322, ,(2010) , 10.1016/J.JMMM.2009.10.055