Structural and magnetic properties of the ThCr2Si2-type PrNi2Si2, PrNi2Ge2, NdNi2Si2 and NdNi2Ge2 compounds

被引：13
作者：
Welter, R
Venturini, G
Malaman, B
机构：
[1] Univ Strasbourg 1, Chim Met Transit Lab, UMR CNRS 7513, Inst Le Bel, F-67070 Strasbourg, France
[2] Univ Nancy 1, Lab Chim Solide Mineral, UMR CNRS 7555, F-54506 Vandoeuvre Les Nancy, France
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 329卷 / 1-2期
关键词：
rare earth compounds; magnetically ordered materials; neutron diffraction; magnetic measurements;
D O I：
10.1016/S0925-8388(01)01678-4
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：
We report on single crystal refinements of the tetragonal ThCr2Si2-type compounds PrNi2Si2, PrNi2Ge2, NdNi2Si2 and NdNi2Ge2. The magnetic properties of PrNi2Ge2 have been investigated by magnetic measurements and neutron diffraction experiments. The PrNi2Ge2, compound orders antiferromagnetically below T-N=24 (1) K with an amplitude-modulated structure (k=0, 0, 0.200). The nickel atom is non magnetic and the Pr moments are parallel to the c-axis with a value of 3.3 mu (B) at 2 K. A new neutron diffraction pattern of the NdNi2Si2 compound has been recorded at 2 K and its analysis confirms the occurrence of the in-plane (a, b) modulated magnetic structure for the Nd sublattice in these compounds. The main correlations between magnetic properties and crystallographic data are analysed in the RNi2X2 (R=Pr, Nd) silicides and germanides. (C) 2001 Elsevier Science B.V. All rights reserved.
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收藏
页码：69 / 75
页数：7
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