Magnetic structures in RNi4B (R=Nd, Tb, Ho, Er)

被引：2
|
作者：
Alleno, E. [1 ]
Mazumdar, C. [2 ]
机构：
[1] CNRS, UMR UPEC 7182, ICMPE, F-94320 Thiais, France
[2] Saha Inst Nucl Phys, Kolkata 700064, India
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2013年 / 202卷
关键词：
Rare earth intermetallics; Ferromagnetism; Neutron scattering; Crystal electric field; NI-B SYSTEM; RARE-EARTH; INTERMETALLIC COMPOUNDS; ELECTRONIC-STRUCTURE; COMPOUNDS R; NEUTRON-DIFFRACTION; CRYSTAL-STRUCTURES; ROOM-TEMPERATURE; SINGLE-CRYSTAL; YNI4B COMPOUND;
D O I：
10.1016/j.jssc.2013.03.003
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Neutron diffraction has been performed on RNi4B (R=Nd, Tb, Ho, Er) polycrystals. The orthorhombic structure for NdNi4B and the CeCO4B structure type (hexagonal) for TbNi4B and HoNi4B are confirmed. Our data also show that this last structure is currently the best approximant for ErNi4B. The RNi4B (R=Nd, Tb, Ho, Er) order ferromagnetically at respectively 11.0, 18.1, 6.2 and 10.0 K. The crystal electric field (CEF) interaction controls the magnetic anisotropy in this series leading to an easy axis similar to 30 deg above the basal plane in RNi4B (R=Nd, Tb, Ho) and parallel to the c-axis in ErNi4B at 1.6 K. The RNi4B (R=Nd, Tb, Ho) display a spin re-orientation below T-c which arises from a competition between the second order term and the higher order terms of the CEF hamiltonian. (C) 2013 Elsevier Inc. All rights reserved.
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页码：15 / 21
页数：7
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