Neutron powder diffraction studies of NdSrNi1-xCuxO4-δ, 0 ≤ x ≤ 1, and magnetic properties

被引：11
作者：
Chaker, H
Roisnel, T
Cador, O
Amami, M
Ben Hassen, R
机构：
[1] Fac Sci Sfax, Unite Rech Chim Mat, Sfax 3018, Tunisia
[2] Univ Rennes 1, CNRS, Chim Solide & Inorgan Mol Lab, Inst Chim Rennes, F-35042 Rennes, France
来源：
SOLID STATE SCIENCES | 2006年 / 8卷 / 02期
关键词：
X-ray diffraction; neutron diffraction; K2NiF4-type structure; bond-valence; magnetic susceptibility measurements; mixed valence character of copper;
D O I：
10.1016/j.solidstatesciences.2005.10.009
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Compounds from the solid solution NdSrNi1-xCuxO4-delta, 0 <= x <= 1, have been prepared using conventional solid state methods and were characterized by X-ray powder diffraction, thermo-gravimetric analysis and magnetic susceptibility measurements. The samples adopt the K2NiF4-type structure. For x = 0.2 and x = 0.6, neutron diffraction measurements were performed and bond-valence sums (BVSs) were calculated from the Brown bond valence calculation theory. Magnetic susceptibility data for all the compositions follow Curie-Weiss behavior in the temperature range 100-300 K with no evidence of long range magnetic ordering down to 2 K. The effect of Cu2+ incorporation on the magnetic properties of NdSrNi1-xCuxO4-delta, 0 <= x <= 1, is discussed. (c) 2005 Elsevier SAS. All rights reserved.
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收藏
页码：142 / 148
页数：7
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