TY  - JOUR
A1  - Zeuschner, Steffen Peer
A1  - Wang, Xi-Guang
A1  - Deb, Marwan
A1  - Popova, Elena
A1  - Malinowski, Gregory
A1  - Hehn, Michel
A1  - Keller, Niels
A1  - Berakdar, Jamal
A1  - Bargheer, Matias
T1  - Standing spin wave excitation in Bi
T2  - Physical review : B, Condensed matter and materials physics
N2  - Based on micromagnetic simulations and experimental observations of the magnetization and lattice dynamics after the direct optical excitation of the magnetic insulator Bi : YIG or indirect excitation via an optically opaque Pt/Cu double layer, we disentangle the dynamical effects of magnetic anisotropy and magneto-elastic coupling. The strain and temperature of the lattice are quantified via modeling ultrafast x-ray diffraction data. Measurements of the time-resolved magneto-optical Kerr effect agree well with the magnetization dynamics simulated according to the excitation via two mechanisms: the magneto-elastic coupling to the experimentally verified strain dynamics and the ultrafast temperature-induced transient change in the magnetic anisotropy. The numerical modeling proves that, for direct excitation, both mechanisms drive the fundamental mode with opposite phase. The relative ratio of standing spin wave amplitudes of higher-order modes indicates that both mechanisms are substantially active.
Y1  - 2022
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/61323
SN  - 2469-9950
SN  - 2469-9969
VL  - 106
IS  - 13
PB  - American Physical Society
CY  - College Park
ER  -