Observation of switching of magnetic particle arrays with weak dipole interaction field effects

摘要: We have measured the subtle changes in magnetic reversal of weakly interacting arrays submicrometer particles as a function particle spacing and interpreted data within context model assuming normal distribution switching fields plus dipole between particles. The measurements were performed on Kerr magnetometer showed characteristics array two in-plane directions. Monte Carlo calculations included effect changing pitch directions explained characteristic change sharpness transition alternatively frustration or an enhanced due to cascading transitions, depending whether hard- easy-axis coupling is dominant. This method extensible nanoscale provides estimate moment particle, measurement which difficult obtain via other experimental methods.