Structural Distortion on Metal-Insulator Transition in Ordered Double Peroyskite Ca2FeReO6
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- Oikawa Kenichi
- Institute of Materials Structure Science, High Energy Accelerator Research Organization
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- Kamiyama Takashi
- Institute of Materials Structure Science, High Energy Accelerator Research Organization
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- Kato Hisato
- Joint Research Center for Atom Technology (JRCAT)
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- Tokura Yoshinori
- Joint Research Center for Atom Technology (JRCAT) Correlated Electron Research Center (CERC) Department of Applied Physics, University of Tokyo
Bibliographic Information
- Other Title
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- Structural Distortion on Metal–Insulator Transition in Ordered Double Perovskite Ca<sub>2</sub>FeReO<sub>6</sub>
Abstract
The crystal and magnetic structures of an ordered double perovskite, Ca2FeReO6, were studied by high-resolution neutron powder diffraction as a function of the temperature from 7 K to 550 K. All of the diffraction data were precisely refined by the Rietveld method, and we confirmed a structural phase transition at around 140 K where the metal–insulator transition occurs from ferrimagnetic metal (FM) to ferrimagnetic insulator (FI) phases. At this temperature, there exists a change in the distortion direction of [ReO6] octahedra together with a spin reorientation, which strongly supports the occurrence of orbital ordering of the t2g electrons. FM and FI phases coexist in a narrow temperature range at around 140 K, which is typically seen in the first-order phase transition. A phase separation was not detected in our well-characterized sample.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 72 (6), 1411-1417, 2003
THE PHYSICAL SOCIETY OF JAPAN
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Keywords
Details 詳細情報について
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- CRID
- 1390001204187067776
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- NII Article ID
- 130004538430
- 210000104258
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- BIBCODE
- 2003JPSJ...72.1411O
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- ISSN
- 13474073
- 00319015
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed