Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera

Opachich YP, Comin A, Bartelt AF, Young AT, Scholl A, Feng J, Schmalhorst J-M, Shin HJ, Engelhorn K, Risbud SH, Reiss G, et al. (2010)
JOURNAL OF PHYSICS-CONDENSED MATTER 22(15): 156003.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
The demagnetization dynamics of the Heusler alloy Co2MnSi was studied using picosecond time-resolved x-ray magnetic circular dichroism. The sample was excited using femtosecond laser pulses. In contrast to the sub-picosecond demagnetization of the metal ferromagnet Ni, substantially slower demagnetization with a time constant of 3.5 +/- 0.5 ps was measured. This could be explained by a spin-dependent band gap inhibiting the spin-flip scattering of hot electrons in Co2MnSi, which is predicted to be half-metallic. A universal demagnetization time constant was measured across a range of pump power levels.
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JOURNAL OF PHYSICS-CONDENSED MATTER
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22
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15
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156003
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Opachich YP, Comin A, Bartelt AF, et al. Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera. JOURNAL OF PHYSICS-CONDENSED MATTER. 2010;22(15):156003.
Opachich, Y. P., Comin, A., Bartelt, A. F., Young, A. T., Scholl, A., Feng, J., Schmalhorst, J. - M., et al. (2010). Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera. JOURNAL OF PHYSICS-CONDENSED MATTER, 22(15), 156003. doi:10.1088/0953-8984/22/15/156003
Opachich, Y. P., Comin, A., Bartelt, A. F., Young, A. T., Scholl, A., Feng, J., Schmalhorst, J. - M., Shin, H. J., Engelhorn, K., Risbud, S. H., et al. (2010). Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera. JOURNAL OF PHYSICS-CONDENSED MATTER 22, 156003.
Opachich, Y.P., et al., 2010. Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera. JOURNAL OF PHYSICS-CONDENSED MATTER, 22(15), p 156003.
Y.P. Opachich, et al., “Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera”, JOURNAL OF PHYSICS-CONDENSED MATTER, vol. 22, 2010, pp. 156003.
Opachich, Y.P., Comin, A., Bartelt, A.F., Young, A.T., Scholl, A., Feng, J., Schmalhorst, J.-M., Shin, H.J., Engelhorn, K., Risbud, S.H., Reiss, G., Padmore, H.A.: Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera. JOURNAL OF PHYSICS-CONDENSED MATTER. 22, 156003 (2010).
Opachich, Y. P., Comin, A., Bartelt, A. F., Young, A. T., Scholl, A., Feng, J., Schmalhorst, Jan-Michael, Shin, H. J., Engelhorn, K., Risbud, S. H., Reiss, Günter, and Padmore, H. A. “Time-resolved demagnetization of Co2MnSi observed using x-ray magnetic circular dichroism and an ultrafast streak camera”. JOURNAL OF PHYSICS-CONDENSED MATTER 22.15 (2010): 156003.

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