Coercivity of isotropic nanocrystalline Pr12Fe82B6 ribbons
Coercivity of isotropic nanocrystalline Pr12Fe82B6 ribbons
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各向同性纳米晶 Pr12Fe82B6 薄带的矫顽力
DOI:
10.1103/physrevb.66.184436
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发表时间:
2002-11
期刊:
影响因子:
--
通讯作者:
张宏伟,荣传兵,张 健,张绍英,沈保根
中科院分区:
文献类型:
--
作者:
张宏伟,荣传兵,张 健,张绍英,沈保根
The magnetization reversal has been examined by the temperature dependence of the coercivity, the initial magnetization curve, minor hysteresis loops, and thermal activation in isotropic nanocrystalline Pr-Fe-B ribbons. The coercivity mechanism is found to vary with temperature. At 20 K, the coercivity is mainly determined by strong pinning (by random inhomogeneities); while at room temperature it is mainly controlled by the nucleation of domain and localized pinning at grain boundaries. The influence of the grain-boundary character on magnetic hardening and the temperature dependence of intergrain exchange coupling and anisotropy have been investigated to discuss the coercivity mechanism.
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