Magnetic Structures and Spin States of NdBaCo2O5

Abstract

Neutron diffraction studies have been carried out on a single crystal of oxygen-deficient perovskite NdBaCo2O5 in the temperature range of 7-370 K. There have been observed, with decreasing temperature T, two magnetic transitions accompanied with structural changes, to the antiferromagnetic phase at ~360 K and to the charge ordered antiferromagnetic one at ~250 K. 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 TN 360 K irrespective of whether the charge ordering is present or not.

8 pages, 7 figures, 2 tables. J. Phys. Soc. Jpn. submitted, corrected typos

References in corpus (2)

• Magnetic Structures of High Temperature Phases of TbBaCo2O5.5
• Transport and Magnetic Properties of R1-xAxCoO3 (R=La, Pr and Nd; A=Ba, Sr and Ca)

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