Crystal structure and magnetic properties of R3Fe0.5GeS7 (R = Y, La, Ce, Pr, Sm, Gd, Tb, Dy, Ho, Er and Tm)

被引：19
|
作者：
Daszkiewicz, M. [1 ]
Pashynska, Yu. O. [2 ]
Marchuk, O. V. [3 ]
Gulay, L. D. [4 ]
Kaczorowski, D. [1 ]
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland
[2] Lutsk Natl Tech Univ, Dept Mat Sci, UA-43018 Lutsk, Ukraine
[3] Eastern European Natl Univ, Dept Inorgan & Phys Chem, UA-43009 Lutsk, Ukraine
[4] Eastern European Natl Univ, Dept Ecol & Protect Environm, UA-43009 Lutsk, Ukraine
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 616卷
关键词：
Rare-earth chalcogenides; Crystal structures; Magnetic properties;
D O I：
10.1016/j.jallcom.2014.07.091
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The crystal structure of quaternary compounds R3Fe0.5GeS7 (R = Y, La, Ce, Pr, Sm, Gd, Tb, Dy, Ho, Er and Tm) was determined by means of single-crystal and powder X-ray diffraction methods. It is of the hexagonal La3Mn0.5SiS7 type (space group P6(3), Pearson symbol hP23) The R atoms occupy trigonal prisms capped with two additional atoms, the Fe atoms are located inside octahedra, and the Ge atoms have tetrahedral environment. Magnetic properties of the compounds R3Fe0.5GeS7 (R = Ce, Pr, Sm, Gd, Tb, Dy, Er and Tm) were studied down to 1.72 K. Their magnetic behaviour results from combined contributions due to R3+ and Fe2+ sublattices. In each material magnetic exchange interactions are dominated by antiferromagnetic correlations. In most of them, the exchange interactions give rise to long-range magnetic orderings at low temperatures. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：243 / 249
页数：7
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