Effect of interface magnetization depinning on the frequency shift of ferromagnetic and spin wave resonance in YIG/GGG films

Lin Fanqing¹, Zhang Shouheng¹, Zhao Guoxia¹, Li Hongfei², Zong Weihua², Li Shandong^{1, †}

(a) The S₂₁ parameters showing FMR measured at out-of-plane external magnetic field H_ext = 4.03 kOe for different microwave powers: –35 dBm, –30 dBm, –25 dBm, –20 dBm, –15 dBm, –10 dBm, –5 dBm, 0 dBm, 2.5 dBm, 5 dBm. (b) FMR frequency f_r (black square), | S₂₁ | amplitude (red dot), and peak width at half height (blue triangle) as a function of the microwave power.