Magnetic structures and spin states of NdBaCo2O5

被引：42

作者：

Soda, M

Yasui, Y

Ito, M

Iikubo, S

Sato, M

Kakurai, K

机构：

[1] Nagoya Univ, Div Mat Sci, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[2] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2004年 / 73卷 / 02期

关键词：

NdBaCo2O5; neutron diffraction; magnetic structure; spin state; charge order;

D O I：

10.1143/JPSJ.73.464

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutron diffraction studies have been carried out on a single crystal of oxygen-deficient perovskite NdBaCo2O5 in the temperature range of 7-370K. There have been observed, with decreasing temperature T, two magnetic transitions accompanied with structural changes, to the antiferromagnetic phase at similar to360K and to the charge ordered antiferromagnetic one at similar to250K. We have studied the magnetic structures at 300 K and 7 K. At these temperatures the Co-moments have the so-called G-type antiferromagnetic structure, and Co ions are considered to be in the high spin state over the whole temperature range below T-N similar to 360K.

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页码：464 / 468

页数：5

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