Magnetization Reversal Phenomena and Domain Wall Behaviors in Nanostructured Magnetic Systems
T. Shinjo
Institute for Chemical Research, Kyoto University Uji, Kyoto-fu 611-0011, Japan
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Several recent experiments on micro- (or nano-) structured samples of ferromagnetic materials are introduced. Magnetization reversal phenomena are investigated on submicron wire samples of trilayer structure using the giant magnetoresistance effect. Domain wall movements are sensitively monitored by resistivity measurements and the velocity of propagation is determined. The contribution of domain wall to the resistivity is argued from the results on artificially designed samples of a spring--magnet system. In circular dots of permalloy, the existence of vortex magnetization is confirmed and the reversal of the vortex core magnetization is studied from magnetic force microscopy measurements.
DOI: 10.12693/APhysPolA.102.147
PACS numbers: 75.50.Tt, 75.75.+a