期刊
JOURNAL OF APPLIED PHYSICS
卷 89, 期 2, 页码 1310-1319出版社
AMER INST PHYSICS
DOI: 10.1063/1.1331656
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Large area arrays of cobalt and nickel particles with truncated conical shapes and diameters of 80-120 nm have been prepared using interference lithography combined with an evaporation and lift-off process. The magnetic hysteresis has been measured and the remanent states of the particles have been compared with a three-dimensional micromagnetic model. The model shows a transition from flower to vortex magnetization states as the particle size increases. The distribution of switching fields and the magnetostatic interactions between particles have been characterized. Both lead to a slow approach to saturation in the hysteresis loops. The suitability of such arrays for data storage is discussed. (C) 2001 American Institute of Physics.
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