Journal
PHYSICAL REVIEW LETTERS
Volume 118, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.117203
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- de Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- de Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- European Union [281043]
- European Union's Seventh Framework Program (FP7)/ERC [257280, 339813]
- EuroMagNET II under the EU [228043]
- HFML-RU/FOM member of the European Magnetic Field Laboratory (EMFL)
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We show that applying magnetic fields up to 30 T has a dramatic effect on the ultrafast spin dynamics in ferrimagnetic GdFeCo. Upon increasing the field beyond a critical value, the dynamics induced by a femtosecond laser excitation strongly increases in amplitude and slows down significantly. Such a change in spin response is explained by different dynamics of the Gd and FeCo magnetic sublattices following a spin-flop phase transition from a collinear to a noncollinear spin state.
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