TY - JOUR
T1 - Saturation of the ultrafast laser-induced demagnetization in nickel
AU - Cheskis, D.
AU - Porat, A.
AU - Szapiro, L.
AU - Potashnik, O.
AU - Bar-Ad, S.
PY - 2005
Y1 - 2005
N2 - We study the loss of magneto-optic contrast in nickel, in response to excitation by a short laser pulse, as a function of excitation density. Our measurements in the picosecond and subpicosecond regime show saturation of the contrast loss at high excitation densities. We conclude that spin relaxation is incomplete on this time scale, and explain the loss of magneto-optic contrast and its saturation in terms of a collapse of the Stoner gap due to band filling effects.
AB - We study the loss of magneto-optic contrast in nickel, in response to excitation by a short laser pulse, as a function of excitation density. Our measurements in the picosecond and subpicosecond regime show saturation of the contrast loss at high excitation densities. We conclude that spin relaxation is incomplete on this time scale, and explain the loss of magneto-optic contrast and its saturation in terms of a collapse of the Stoner gap due to band filling effects.
UR - http://www.scopus.com/inward/record.url?scp=33749158967&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.72.014437
DO - 10.1103/PhysRevB.72.014437
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AN - SCOPUS:33749158967
SN - 1098-0121
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 1
M1 - 014437
ER -