Magnetic Structures and Spin States of NdBaCo2O5.5
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- Soda Minoru
- Department of Physics, Division of Material Science, Nagoya University
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- Yasui Yukio
- Department of Physics, Division of Material Science, Nagoya University
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- Ito Masafumi
- Department of Physics, Division of Material Science, Nagoya University
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- Iikubo Satoshi
- Department of Physics, Division of Material Science, Nagoya University
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- Sato Masatoshi
- Department of Physics, Division of Material Science, Nagoya University
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- Kakurai Kazuhisa
- Advanced Science Research Center, Japan Atomic Energy Research Institute
Bibliographic Information
- Other Title
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- Magnetic Structures and Spin States of NdBaCo<sub>2</sub>O<sub>5.5</sub>
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Abstract
Neutron diffraction studies have been carried out on a single crystal of oxygen-deficient perovskite NdBaCo2O5.5 in the temperature (T) range between 7 K and 320 K. We have found a magnetic transition at Tc∼170 K, and a rapid change of the intensities of several reflections at T*∼30 K. The magnetic structures have been analyzed at 7 K (<T*) and 40 K (T*<T<Tc). Non-collinear magnetic structures, which are based on the G-type antiferromagnetic structure, are proposed at these temperatures. In the T region between T* and Tc, Co3+ ions of CoO6 octahedra are in the intermediate spin state, and those of CoO5 pyramids are in the high spin state. In the region of T<T*, the magnitude of the Co3+ spins in the octahedra decreases gradually as T decreases, suggesting that the spin state approaches the low spin state. It is pointed out that the spin state of Co ions depends on the local structure around them.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 73 (10), 2857-2862, 2004
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679165099648
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- NII Article ID
- 110001979217
- 210000105099
- 130004538591
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- NII Book ID
- AA00704814
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- BIBCODE
- 2004JPSJ...73.2857S
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 7121282
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed