Crystallographic and magnetic properties of hydride R3Fe29-xTxHy (R=Y, Ce, Nd, Sm, Gd, Tb and Dy; T=V and Cr)

被引：2
作者：
Han, XF
Lin, LY
Baggio-Saitovitch, E
Xu, RG
Wang, XH
Pan, HG
机构：
[1] Chinese Acad Sci, Inst Semicond, Ctr Mat Sci, Beijing 100083, Peoples R China
[2] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[3] Zhejiang Univ, Dept Mat, Hangzhou 310027, Peoples R China
来源：
MAGNETISM, MAGNETIC MATERIALS AND THEIR APPLICATIONS | 1999年 / 302-3卷
关键词：
magnetic properties; hydride; hydrogenation; saturation magnetization; curie temperature; first-order magnetization process; R3Fe29-xTxHy;
D O I：
10.4028/www.scientific.net/MSF.302-303.294
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The crystallographic and intrinsic magnetic properties of hydride R3Fe29-xTxHy (R=Y, Ce, Nd, Sm, Gd, Tb, and Dy; T=V and Cr) have been investigated. The lattice constants and the unit cell volume of R3Fe29-xTxHy decrease with increasing R atomic number from Nd to Dy, except for Ce, reflecting the lanthanide contraction. Regular anisotropic expansions, mainly along the a- and b-axis rather than along the c-axis, are observed for all the compounds upon hydrogenation. Hydrogenation leads to an increase in Curie temperature. First-order magnetization processes (FOMP) occur in magnetic fields of around 1.5 T and 4.0 T at 4.2 K for Nd3Fe24.5Cr4.5H5.0 and Tb(3)Fc(27.0)Cr(2.0)H(2.8), and around 1.4 T at room temperature for Gd3Fe28.0Cr1.0H4.2 Abnormal crystallographic and magnetic properties of Ce3Fe29-xTxHy suggest that the Ce ion is non-triply ionized.
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页码：294 / 298
页数：5
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