We describe the detailed design of a highly sensitive magnetometer based on micro-magneto-optical Kerr effect (MOKE) magnetometry, consisting of an optical microscope combined with an ordinary MOKE set-up. The system enables microscopic MOKE hysteresis loops to be measured with a spatial resolution 104 times better than that of conventional longitudinal MOKE magnetometry. The sensitivity of the system is demonstrated by measuring MOKE hysteresis curves of submicron permalloy rectangular dots and wires.
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Akahane et al. (2004) studied this question.
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