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Dynamics of photoinduced KR angle measured for the as-grown sample at . (a) KR measured for and CP pump pulses; (b) KR measured for and LP pump pulses. (c) Polarization-independent part [(d) polarization-dependent part] of KR signal, which was computed from the measured traces as an average of the signals (a half of the difference between the signals) detected for pump pulses with the opposite CP (LP). Inset: Fourier transform of the oscillations. No external magnetic field was applied during the sample cooling.
The fitting procedure applied to the polarization-independent part of KR signal. (a) The measured data from Fig. 1(c) (points) are fitted (solid line) by a sum of the exponentially damped sine harmonic oscillation [solid line in part (b)] and the pulselike KR signal [dashed line in part (b)]. Inset: dynamics of the reflectivity change (thick solid line) and the detail of the fitted KR signal.
Intensity dependence of (a) and and (b) and measured at ; , no external magnetic field was applied during the sample cooling. [(c) and (d)] Temperature dependence of , , and (points) measured at pump intensity . The open point in (d) was obtained for the sample cooled with no external magnetic field applied and the data in (c) and the solid points in (d) were obtained for the sample cooled with magnetic field applied along . The lines in (d) are the temperature dependence of the sample magnetization projections to different crystallographic directions measured by SQUID.
Polarization-independent part of KR signal measured for the annealed sample at ; , the sample was cooled with magnetic field applied along . Inset: temperature dependence of the sample magnetization projections to different crystallographic directions measured by SQUID.
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