Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-12-07
Physics
Condensed Matter
Strongly Correlated Electrons
11pages, 3 figures
Scientific paper
The dynamic coercivity cannot be measured rigorously by the conventional time-resolved magneto-optical Kerr effect technique because the irreversible deviation of the transient magnetization is accumulated. In order to remove the accumulation effect, the alternating magnetic field is employed and synchronized with the femtosecond laser pulse. Since the sample is reset before each single laser pulse, the accumulation effect of the irreversible deviation of the transient magnetization is removed. For perpendicularly magnetized $L1_{\mathrm{0}}$ FePt films, the dynamic magnetization reversal process is accomplished by the nucleation of reversed domains and the pinned domain wall motion.
Chen Zhi-Fu
Du Jiulin
Gao R. X.
Lai Shan T.
Liu Xiang D.
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