ANTIFERROMAGNETISM IN THE R2BANIO5 OXIDES (R = ND, EU, DY, HO)

被引：11

作者：

SAEZPUCHE, R ^{[1
]}

CORONADO, JM ^{[1
]}

MARTINLLORENTE, JM ^{[1
]}

RASINES, I ^{[1
]}

机构：

[1] CSIC,INST CIENCIA MAT,E-28006 MADRID,SPAIN

来源：

MATERIALS CHEMISTRY AND PHYSICS | 1992年 / 31卷 / 1-2期

关键词：

D O I：

10.1016/0254-0584(92)90168-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The family of mixed oxides R2BaNiO5 (R = Nd-Tm and Y) which crystallise with orthorhombic symmetry, space group Immm, shows as main structural feature the existence of isolated chains of flattened (NiO6) octahedra along the a-axis, giving rise to very short Ni-O(axial)-Ni at 180-degrees distances (3.75 angstrom for Er2BaNiO5). This justifies the one-dimensional antiferromagnetic behavior that we have reported for Y2BaNiO5. Magnetic susceptibility measurements for R2BaNiO5 (R = Nd, Eu, Dy and Ho) confirm the one-dimensional antiferromagnetic behavior along the nickel chains above room temperature. The magnetic moments calculated from the linear part of the chi--1 vs. T plots agree with those expected for the different paramagnetic R3+ lanthanoid ions. However, in all cases we have observed the existence of a maximum in the chi vs. T plots between 44 K and 10 K depending on R3+. The presence of these maximum has been attributed to the existence of three-dimensional antiferromagnetics interactions in both R3+ and Ni2+ sublattices.

引用

页码：151 / 154

页数：4

共 14 条

[1] NEUTRON-DIFFRACTION STUDY OF THE MAGNETIC-STRUCTURE OF ER2BANIO5 [J].