期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.117202
关键词
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资金
- Netherlands Organization for Scientific Research (NWO)
- de Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- European Community [NMP3-SL-2008-214469, N 214810]
- French Fondation Nanoscience and Dynawall project [ANR-07-NANO-034]
Using 100 fs laser pulses, a high-frequency exchange and a low-frequency ferromagnetic resonance mode have been excited and detected in an amorphous Gd1-xCox (78 <= x <= 85) ferrimagnetic thin film, on both sides of its angular momentum compensation composition. The excitation efficiency of these modes strongly depends on the amount of laser-induced heating. Ways of selectively and efficiently exciting either one or both of these two coexisting magnetic modes by adjusting laser pulse intensity are demonstrated.
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