Magnetic aftereffect and magnetization processes of nanocrystalline /spl alpha/-Fe/Nd/sub 2/Fe/sub 14/B two-phase magnet alloys
Magnetic aftereffect and magnetization processes of nanocrystalline /spl alpha/-Fe/Nd/sub 2/Fe/sub 14/B two-phase magnet alloys
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DOI：
10.1109/20.489585
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发表时间：
1995-11
影响因子：
2.1
通讯作者：
J. Yao;T. Chin;J. Fang;S. Chen
中科院分区：
文献类型：
--
作者：
J. Yao;T. Chin;J. Fang;S. Chen
对熔纺纳米结构的α - Fe/Nd₂Fe₁₄B两相合金的磁后效和磁化过程进行了研究。经过热处理的、由纳米尺寸晶粒组成的薄片由于晶间交换相互作用（类似于交换弹簧行为）而表现出增强的磁性能。在稳恒磁场中，磁化强度随时间呈对数衰减，这与巴比耶图和分析结果一致。激活体积随软铁含量的增加而增大。直流退磁剩磁数据阐明了不可逆退磁过程。软铁相负责可逆磁化（M₍rev₎），它与硬相发生交换耦合并降低M₍rev₎。
Magnetic aftereffect and magnetization process of melt-spun nanostructured /spl alpha/-Fe/Nd/sub 2/Fe/sub 14/B two-phase alloys have been investigated. The heat-treated flakes composed of nanoscaled grain size show enhanced magnetic properties due to the intergranular exchange interaction similar to the exchange-spring behavior. The magnetization shows a logarithmic decay with the elapsed time in a steady field, being consistent with the Barbier plot and analytical results. The activation volume increases with increasing content of soft iron. The dc-demagnetization remanence data elucidate the irreversible demagnetization process. The soft iron phase, being responsible for reversible magnetization (M/sub rev/), exchange-couples with the hard phase and lessens the M/sub rev/.