Details

Autor(en) / Beteiligte

• Becker, J
• Tsukamoto, A
• Kirilyuk, A
• Maan, J C
• Rasing, Th
• Christianen, P C M
• Kimel, A V

Titel

Ultrafast Magnetism of a Ferrimagnet across the Spin-Flop Transition in High Magnetic Fields

Ist Teil von

• Physical review letters, 2017-03, Vol.118 (11), p.117203-117203

Ort / Verlag

United States

Erscheinungsjahr

2017

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.