Photoinduced nonlinear magnetoelectric effect detection in Zn2Y hexaferrite

The photoinduced nonlinear magnetoelectric effect was investigated in the single-crystal Y-type Ba2Zn2Fe12O22 (Zn2Y) hexaferrite under ultraviolet radiation. We observed a downshift of the ferromagnetic resonance frequency caused by decreasing the effective saturation magnetization. The maximum observed shift of the resonance frequency was equal to 110 MHz corresponding to effective saturation magnetization decrease by 256 G. A strong nonlinear change in effective saturation magnetization was observed as the result of the photoinduced nonlinear magnetoelectric effect. The strength of the photoinduced nonlinear magnetoelectric effect was found to be up to 85% higher compared to the strength of the nonlinear magnetoelectric effect. The results demonstrate the possibility of optical tuning of the ferromagnetic resonance frequency and the mechanism of using the single-crystal Zn2Y for radiation detection.