Two-Dimensional Propagation of a Photoinduced Spin Wave Packet

Details Two-Dimensional Propagation of a Photoinduced Spin Wave Packet Two-Dimensional Propagation of a Photoinduced Spin Wave Packet

2011-07-13

arxiv.org/abs/1107.2457v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures

Scientific paper

We report the two-dimensional propagation of photoinduced spin wave packets in Bi-doped rare-earth iron garnet. Spin waves were excited nonthermally and impulsively by a circularly polarized light pulse via the inverse Faraday effect. Space- and time resolved spin waves were detected with a magneto-optical pump-probe technique. We investigated propagation in two directions, parallel and perpendicular to the magnetic field. Backward volume magnetostatic waves (BVMSWs) were detected in both directions. The frequency of BVMSWs depends on the propagation direction. The experimental results agreed well with the dispersion relation of BVMSWs.

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