Fig. 3
From: Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy
Effect of sample temperature. a Faraday rotation of a continuous-wave laser beam (wavelength 532 nm) after transmission through a YIG(3 µm)|Pt(5.5 nm) sample as a function of the sample temperature. A fit proportional to \(\left( {T_{\mathrm{C}} - T_0} \right)^\alpha\) (ref. 33) yields a critical exponent of α = 0.5 and a Curie temperature of TC = 550 K. b Temperature dependence of the amplitude of the magnetic THz emission signal S−, which differs from that of the sample magnetization, similar to previous work on the DC SSE32. The solid line is a fit proportional to \(\left( {T_{\mathrm{C}} - T_0} \right)^\alpha\), here yielding α = 2.0 ± 0.5
