Abstract
Irradiating with pulsed laser light induces high-speed optical switching of surface magnetization-induced second harmonic generation (MSHG) in Fe0.52Rh0.48 thin films at room temperature. The second harmonic rotation angle (θSH) of 25.0° was recorded in the irradiated film at 2000 Oe. This θSH value is as much as 740 times larger than the normal Kerr rotation angle (0.034° at 388 nm). The observed gigantic θSH value is attributed to surface MSHG on the ferromagnetic phase in Fe0.52Rh0.48, which is generated by the optical heating.
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