期刊
PHYSICAL REVIEW B
卷 61, 期 21, 页码 14716-14722出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.61.14716
关键词
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Relaxation processes on the picosecond and subpicosecond time scale after optical excitation have been studied by time-resolved ma,magnetization-induced second-harmonic generation from ferromagnetic nickel. A fast drop of the second-harmonic intensity and the Kerr-signal within 300 fs after optical excitation has been observed which is followed by a partial recovery within a few picoseconds. We show that the fast initial drop cannot be unambiguously attributed to an ultrafast decrease of the magnetization.
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