TY - JOUR
T1 - Quadratic magneto-optical Kerr effect in Co2MnSi
AU - Wolf, Georg
AU - Hamrle, Jaroslav
AU - Trudel, Simon
AU - Kubota, Takahide
AU - Ando, Yasuo
AU - Hillebrands, Burkard
N1 - Funding Information:
Financial support by DFG Research Unit 559, New Materials with High Spin Polarization and DFG-JST Research Unit 1464 ASPIMATT is acknowledged. J.H. acknowledges financial support by PIEF-GA-2009-254522 and CZ.1.05/2.1.00/01.0040, and S.T. from Canada’s NSERC.
PY - 2011/8/15
Y1 - 2011/8/15
N2 - Quadratic magneto-optical Kerr effects (QMOKE) are investigated in epitaxial Co2 MnSi thin films as a function of the post-deposition annealing temperature. We determine the amplitude of the QMOKE signal for different annealing temperatures, which provide various degrees of L2 1 crystal ordering, as manifested by X-ray diffraction. We observe that QMOKE is significantly present only when the L21 ordering phase is also present, and that the QMOKE signal increases with the higher degree of L21 ordering. Additionally, we notice that the linear magneto-optical Kerr effect (LMOKE) decreases with higher annealing temperature. A comparison of the linear and quadratic MOKE contributions shows the amplitudes are of similar magnitude. From these results, we conclude that the presence of QMOKE is linked to the higher degree of L21 ordering in Co2 MnSi.
AB - Quadratic magneto-optical Kerr effects (QMOKE) are investigated in epitaxial Co2 MnSi thin films as a function of the post-deposition annealing temperature. We determine the amplitude of the QMOKE signal for different annealing temperatures, which provide various degrees of L2 1 crystal ordering, as manifested by X-ray diffraction. We observe that QMOKE is significantly present only when the L21 ordering phase is also present, and that the QMOKE signal increases with the higher degree of L21 ordering. Additionally, we notice that the linear magneto-optical Kerr effect (LMOKE) decreases with higher annealing temperature. A comparison of the linear and quadratic MOKE contributions shows the amplitudes are of similar magnitude. From these results, we conclude that the presence of QMOKE is linked to the higher degree of L21 ordering in Co2 MnSi.
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U2 - 10.1063/1.3622512
DO - 10.1063/1.3622512
M3 - Article
AN - SCOPUS:80052418357
VL - 110
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 4
M1 - 043904
ER -