期刊
JOURNAL OF APPLIED PHYSICS
卷 95, 期 11, 页码 7447-7449出版社
AMER INST PHYSICS
DOI: 10.1063/1.1667440
关键词
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A method for back-tracing magnetic field pulses in pump-probe-type magnetization dynamics measurements is presented. Solving vectorially the Landau-Lifshitz-Gilbert equation for our field-induced measurement geometry yields field pulse profiles fulfilling the theoretical expectations on a 100 ps timescale. Applying the method to our earlier, all-optical-type pump-probe measurements, the claim that the optical pulse triggers an ultrafast anisotropy field pulse gets a direct proof: we derive a pulse consisting of a delta-peak type, full width at half maximum <5 ps impulse on top of a very fast rising step-like profile. Application of the method to other, less trivial pump-probe schemes can contribute to the development of novel type magnetic recording technologies. (C) 2004 American Institute of Physics.
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