SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 40: Poster Magnetism II
MA 40.34: Poster
Donnerstag, 30. März 2023, 14:00–16:00, P2/EG
Quantification of anisotropic and magneto-elastic contributions to the SSW excitation in Bi:YIG films via UXRD — •Steffen Peer Zeuschner1, Xi-Guang Wang3,4, Marwan Deb1, Elena Popova5, Gregory Malinowski6, Michel Hehn6, Alexander von Reppert1, Nils Keller5, Jamal Berakdar4, and Matias Bargheer1,2 — 1Universität Potsdam, 14476 Potsdam, Germany — 2Helmholtz-Zentrum Berlin, 12489 Berlin, Germany — 3Central South University, Changsha 410083, China — 4Martin-Luther Universität, 06099 Halle/Saale, Germany — 5Institut de Physique de Rennes (IPR, CNRS) UMR6251 Université Rennes, 35000 Rennes, France — 6Institut Jean Lamour (IJL, CNRS) UMR 7198, Université de Lorraine, 54506 Vandaeuvre-lès-Nancy, France
The photoexcited standing spin waves (SSWs) in the ferromagnetic insulator Bi:YIG are generated by the ultrafast change of the magnetocrystalline anisotropy and the picosecond strain dynamics via magneto-elasticity. Ultrafast X-ray diffraction (UXRD) quantifies the strain and temperature spatio-temporally which is used as in input to a numerical micromagnetic model to fit the ultrafast time-resolved magneto-optical Kerr-effect (tr-MOKE) data of the thin film which exhibits SSWs. With this, we prove that both mechanisms drive the fundamental mode with opposite phase. Both mechanisms are also substantially active as the relative amplitude of the higher order modes indicates. This is a prime example for the exceptional assistance UXRD offers in the understanding and modelling of ultrafast magnetic phenomena.