Circular single domains in hemispherical Permalloy nanoclusters
作者： Clodoaldo IL de Araujo , Jakson M Fonseca , Joao P Sinnecker , Rafael G Delatorre , Nicolas Garcia
DOI: 10.1063/1.4901573
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摘要: We have studied ferromagnetic Permalloy clusters obtained by electrodeposition on n-type silicon. Magnetization measurements reveal hysteresis loops almost independent temperature and very similar in shape to those nanodisks with diameter bigger than 150 nm. The spin configuration for the ground state, micromagnetic simulation, shows topological vortices random chirality polarization. This behavior small (∼80 nm) is attributed Dzyaloshinskii-Moriya interaction that arises its hemispherical geometries. magnetization can be utilized explain magnetoresistance measured magnetic field plane out of sample plane.
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