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A scheme of the experimental setup.
(a) MOKE measurements of magnetic hysteresis of the (Ga,Mn)As film measured with the pulse picker off and on (with and ). (b) The measured coercive field as a function of pulse energy . The vertical arrow indicates the pulse energy used to measure dynamics of the PCE in Fig. 4.
(a) Schematic representation of pulse trains with repetition rate of 100 and 0.2 Hz . (b) Magnetic switching observed for repetition rate of 100 and 0.2 Hz. The sweep rate of the magnetic field is 1.4 mT/s. At low repetition rates, switching is delayed until a pulse arrives.
(a) Schematic representation of a double-pulse train (100 Hz) with being the delay between two pulses. (b) Temporal behavior of the coercive field. corresponds to the coercive field detected in the quasistatic MOKE experiment. (c) The coercive field of the (Ga,Mn)As sample as a function of . As the delay is increased, the coercive field is reduced toward the that observed with the individual pulses. Solid line is a fit to Eq. (1) with the time constant .
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