Photothermally modulated spatially resolved FMR detection of Walker modes in yttrium iron garnet spheres

O. von Geisau , F. Rödelsperger , F. Schreiber , H. Benner , J. Pelzl

The photothermally modulated (PM) ferromagnetic resonance (FMR) combines the high sensitivity of conventional FMR and spatial resolution. This technique has been applied to a single-crystalline yttrium iron garnet (YIG) sphere with a diameter of 2 mm. For the first time, the spatial variation of the high-frequency magnetization patterns known as Walker modes were visualized and it is thus shown that PM-FMR can even be applied to unfavourable geometries.

Domaines: Articles anciens

O. von Geisau, F. Rödelsperger, F. Schreiber, H. Benner, J. Pelzl. Photothermally modulated spatially resolved FMR detection of Walker modes in yttrium iron garnet spheres. Journal de Physique IV Proceedings, 1994, 04 (C7), pp.C7-655-C7-658. ⟨10.1051/jp4:19947155⟩. ⟨jpa-00253214⟩