Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 41, Issue 16, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/41/16/164009
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Details are presented of a single shot focused magneto-optic Kerr effect (MOKE) magnetometer which is used to capture the movement of single domain walls (DWs) in permalloy (Ni(80) Fe(20)) nanowires (>= 400 nm width and >= 20 nm thickness) in real time. By probing the DW motion within the 1 mu m diameter laser spot of the instrument, DW velocity and pinning field distributions were obtained. An external field was ramped up linearly, and depinning of a DW from the same start position was observed at three different fields, indicating the stochastic nature of the DW motion.
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