Gong Yi-Min et al 2008 Chinese Phys. B 17 1130 doi:10.1088/1674-1056/17/3/063
Gong Yi-Min1, Lan Zhi-Huan1, Yan Yu1, Du Xiao-Bo1, Wang Wen-Quan1, Wang Xue-Feng1, Su Feng1, Lu Lei1, Zhang Zhi-Sheng1, Jin Han-Min1 and Wen Ge-Hui2
Show affiliationsIn this paper magnetization remanence curves were studied for nanocrystalline Pr8Fe87B5, Pr12Fe82B6 and Pr15Fe77B8. Initially the sample was at remanence following saturation along z-axis. After rotating the magnet by 5n degrees (n = 0, 1, ..., 18) a field H was applied along z-axis and then decreased to zero, and the remanence Jnr was measured as a function of H. The curves were compared with those calculated based on the nucleation of reverse domain model and domain wall pinning model. The latter model succeeds in simulation much better than the former, and it is concluded that the magnetization reversal is dominated by domain wall pinning for all the samples. The nucleation mechanism contribution, while remains small, increases with the increase of Pr content.
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.75.+a Magnetic properties of nanostructures
75.50.Tt Fine-particle systems; nanocrystalline materials
Issue 3 (March 2008)
Received 3 April 2007, in final form 18 July 2007
Gong Yi-Min et al 2008 Chinese Phys. B 17 1130
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