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Probing magnetization reversal process in ferromagnetic disk by superconductor-ferromagnet junction

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We use lateral superconductor (SC)-ferromagnet (FM)-SC device to probe the magnetization reversal process of micron sized FM disk. Upon decreasing external magnetic field from saturated state, a buckling pattern forms first. The onset of buckling pattern and its switching to vortex state are studied with the help of Andreev conductance of the SC-FM interface below the critical temperature (Tc) of SC and the magnetoresistances both below and above the Tc. In the latter case, micromagnetic modeling has been carried out to interpret the experimental results by taking into account the current distributions when the electrodes are at different states.

Published in:

Applied Physics Letters  (Volume:97 ,  Issue: 4 )

Date of Publication:

Jul 2010

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