Mossbauer Study of Nd-Fe-Al Nanocomposites

机译：Nd-Fe-Al纳米复合材料的Mossbauer研究

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The effects of the cooling rate on the microstructure and magnetic properties of the melt-spun Nd_(60)Fe_(30)Al_(10) alloys are investigated by Mossbauer Effect (ME) Spectroscopy and magnetic hysteresis loops measurements at different temperatures. It is found that the hard magnetic properties of these alloys are likely to be related to the presence of clusters of a metastable crystalline μ-type phase. It is observed that as the cooling rate increases, the amount of this magnetic μ-like phase component decreases in the benefit of an amorphous Nd-rich phase. This phase has an iron concentration, which increases with increasing the wheel speed, is paramagnetic at room temperature and becomes superparamagnetic below approximately 50 K and 100 K for slow and high cooling rates, respectively.

机译：通过Mossbauer效应（ME）光谱学和在不同温度下的磁滞回线测量研究了冷却速率对熔纺Nd_（60）Fe_（30）Al_（10）合金的组织和磁性能的影响。已经发现，这些合金的硬磁性能可能与亚稳态结晶μ型相簇的存在有关。观察到，随着冷却速率的增加，这种磁性μ样相成分的数量减少，这有利于非晶态的富Nd相。该相的铁浓度随轮速的增加而增加，在室温下为顺磁性，在慢速和高冷却速率下分别低于约50 K和100 K时变为超顺磁性。

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来源
《International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials(ISMANAM 2003); 20030824-20030828; Foz do Lguacu; BR》|2003年|P.679-684|共6页
会议地点 Foz do Iguacu(BR);Foz do Iguacu(BR)
作者
A.F. Cabrera; C.E. Rodriguez Torres; F.H. Sanchez; O.V. Billoni; S.E. Urreta; L.M. Fabietti;
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作者单位

Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 1900 La Plata, Argentina;

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原文格式 PDF
正文语种 eng
中图分类材料结构及物理性质;
关键词
amorphous RE-TM; hard magnetic properties; melt spinning; mossbauer spectroscopy;

机译：非晶态RE-TM;硬磁性能;熔融纺丝;莫斯鲍尔光谱;

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Mossbauer Study of Nd-Fe-Al Nanocomposites

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