Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 054430 |
| Fachzeitschrift | Physical Review B |
| Jahrgang | 106 |
| Ausgabenummer | 5 |
| Publikationsstatus | Veröffentlicht - 24 Aug. 2022 |
| Extern publiziert | Ja |
Abstract
We investigate the microwave spin excitations of the cubic chiral magnet Fe0.75Co0.25Si as driven by the thermal modulation of magnetic interactions via laser heating and probed by time-resolved measurements of the magneto-optical Kerr effect. Focusing on the topologically nontrivial skyrmion lattice state, the dynamic properties in thermodynamic equilibrium are compared with those of a metastable state prepared by means of rapid field cooling. In both cases, we find precessional and exponential contributions to the dynamic response, characteristic of a breathing mode and energy dissipation, respectively. When taking into account the universal scaling as a function of temperature, the precession frequencies in the equilibrium and metastable skyrmion state are in excellent quantitative agreement. This finding highlights that skyrmion states far from thermal equilibrium promise great flexibility, for instance, with respect to temperature and field scales, both for possible microwave applications and for the study of fundamental properties.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
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in: Physical Review B, Jahrgang 106, Nr. 5, 054430, 24.08.2022.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Optically excited spin dynamics of thermally metastable skyrmions in Fe0.75Co0.25Si
AU - Kalin, J.
AU - Sievers, S.
AU - Füser, H.
AU - Schumacher, H. W.
AU - Bieler, M.
AU - García-Sánchez, F.
AU - Bauer, A.
AU - Pfleiderer, C.
N1 - Publisher Copyright: © 2022 American Physical Society.
PY - 2022/8/24
Y1 - 2022/8/24
N2 - We investigate the microwave spin excitations of the cubic chiral magnet Fe0.75Co0.25Si as driven by the thermal modulation of magnetic interactions via laser heating and probed by time-resolved measurements of the magneto-optical Kerr effect. Focusing on the topologically nontrivial skyrmion lattice state, the dynamic properties in thermodynamic equilibrium are compared with those of a metastable state prepared by means of rapid field cooling. In both cases, we find precessional and exponential contributions to the dynamic response, characteristic of a breathing mode and energy dissipation, respectively. When taking into account the universal scaling as a function of temperature, the precession frequencies in the equilibrium and metastable skyrmion state are in excellent quantitative agreement. This finding highlights that skyrmion states far from thermal equilibrium promise great flexibility, for instance, with respect to temperature and field scales, both for possible microwave applications and for the study of fundamental properties.
AB - We investigate the microwave spin excitations of the cubic chiral magnet Fe0.75Co0.25Si as driven by the thermal modulation of magnetic interactions via laser heating and probed by time-resolved measurements of the magneto-optical Kerr effect. Focusing on the topologically nontrivial skyrmion lattice state, the dynamic properties in thermodynamic equilibrium are compared with those of a metastable state prepared by means of rapid field cooling. In both cases, we find precessional and exponential contributions to the dynamic response, characteristic of a breathing mode and energy dissipation, respectively. When taking into account the universal scaling as a function of temperature, the precession frequencies in the equilibrium and metastable skyrmion state are in excellent quantitative agreement. This finding highlights that skyrmion states far from thermal equilibrium promise great flexibility, for instance, with respect to temperature and field scales, both for possible microwave applications and for the study of fundamental properties.
UR - http://www.scopus.com/inward/record.url?scp=85137656139&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.106.054430
DO - 10.1103/PhysRevB.106.054430
M3 - Article
VL - 106
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 5
M1 - 054430
ER -