MAGNETIC-PROPERTIES OF NOVEL R2BACOO5 OXIDES (R=PR, ND, HO)

被引：6

作者：

HERNANDEZVELASCO, J

SAEZPUCHE, R

RODRIGUEZCARVAJAL, J

GARCIAMATRES, E

MARTINEZ, JL

机构：

[1] UCM,FAC CIENCIAS QUIM,DEPT QUIM INORGAN,E-28040 MADRID,SPAIN

[2] CENS,CEA,CNRS,LEON BRILLOUIN LAB,F-91191 GIF SUR YVETTE,FRANCE

[3] UAM,CSIC,INST CIENCIA MAT,FAC CIENCIAS C-4,E-28049 MADRID,SPAIN

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1994年 / 207卷

关键词：

D O I：

10.1016/0925-8388(94)90216-X

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 new Pr2BaCoO5 crystallizes with orthorhombic symmetry, space group Immm and the lattice parameters are: a = 3.8246(3) angstrom, b = 5.9942(5) angstrom and c = 11.8539(9) angstrom. Magnetic susceptibility measurements reveal the existence of one-dimensional antiferromagnetic interactions around the room temperature in the Co2+ sublattice for the isostructural Nd2BaCoO5 oxide. Below 20 K neutron diffraction data show three-dimensional antiferromagnetic ordering in which both the Co2+ and R3+ sublattices are involved. This transition involves a propagation vector k = [1/2, 0, 1/2] in the case of the neodymium oxide; while the wave vector corresponding to the magnetic structure for the Ho2BaCoO5, which crystallizes in the Pnma space group, can be described as k = [0, 1/2, 1/2].

引用

页码：257 / 262

页数：6