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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >A magnetic and Mossbauer spectral study of HoFe_(11)Ti and HoFe_(11)TiH
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A magnetic and Mossbauer spectral study of HoFe_(11)Ti and HoFe_(11)TiH

机译：HoFe_（11）Ti和HoFe_（11）TiH的磁和Mossbauer光谱研究

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摘要

A.c. susceptibility measurements were carried out between 4.2 and 295 K on HoFe_(11)TiH and reveal a spin-reorientation transition at approx 150 K. Iron-57 Mossbauer spectral measurements between 4.2 and 295 K were carried out on both HoFe_(11)Ti and HoFe_(11)TiH. The Mossbauer spectra were analyzed with a model which considers both the orientation of the iron magnetic moments and the distribution of titanium atoms in the near-neighbor environment of the three crystallographically distinct iron sites. The assignment and the temperature dependence of the hyperfine fields is in complete agreement with both the iron magnetic moments measured by neutron diffraction and the changes expected at the spin-reorientation. The assignment and the temperature dependence of the isomer shifts is in complete agreement both with the crystallographic changes occurring at the spin reorientation and upon hydrogen insertion. The changes in hyperfine field and isomer shift with the number of titanium near neighbors for each of the three iron sites are consistent with the values observed for related titanium-iron intermetallic compounds.
机译：交流电在HoFe_（11）TiH上在4.2和295 K之间进行磁化率测量，并揭示了在大约150 K时的自旋取向转变。在HoFe_（11）Ti和Ti上都在4.2和295 K之间进行了Iron-57 Mossbauer光谱测量HoFe_（11）TiH。使用模型来分析Mossbauer光谱，该模型既考虑了铁磁矩的方向，又考虑了三个在晶体学上不同的铁位点的近邻环境中钛原子的分布。超精细场的分配和温度依赖性与通过中子衍射测量的铁磁矩以及在自旋取向时预期的变化完全一致。异构体位移的赋值和温度依赖性与在自旋重新取向时以及在氢插入时发生的晶体学变化完全一致。对于这三个铁位点中的每一个，超精细场的变化和异构体位移随邻近的钛数目的变化与相关钛铁金属间化合物的观察值一致。

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