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- Fujiwara K.
- Graduate School of Natural Science and Technology, Okayama University
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- Miyajima M.
- Department of Physics, Faculty of Science, Okayama University
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- Fukunaga M.
- Graduate School of Natural Science and Technology, Okayama University
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- Kano J.
- Graduate School of Natural Science and Technology, Okayama University JST-PREST
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- Kobayashi H.
- Graduate School of Natural Science and Technology, Okayama University
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- Ikeda N.
- Graduate School of Natural Science and Technology, Okayama University
書誌事項
- タイトル別名
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- Iron vacancy effect on the magnetization of YbFe<sub>2</sub>O<sub>4</sub>
抄録
We report the effect of iron vacancies on the magnetic property of spin and charge ordered system YbFe2O4 single crystals. The excess amount of iron compensates for the evaporation of iron during crystal growth. We concluded that samples grown with the standard method contain iron vacancies of more than 10%. It is considered that increasing the iron in the starting material recovers the iron stoichiometry, and the proper magnetic property appears. With recovery of the chemical stoichiometry, the magnetic hysteresis loop changes from a double loop to a single loop, which indicates the development of spin coherence and the appearance of a large ferrimagnetic domain. The anomaly found in the thermomagnetization curve at approximately 150 K, the so-called TLT transition, disappears with better stoichiometry. This fact indicates that TLT is not a kind of phase transition but an effect of iron vacancy. Our discovery demonstrates that most of the crystals used in RFe2O4 research might contain many iron vacancies. The confused discussions on this material about the spin order model, the charge order model, and so on might reconsider such chemical stoichiometry, including iron vacancies.
収録刊行物
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- Transactions of the Materials Research Society of Japan
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Transactions of the Materials Research Society of Japan 41 (1), 139-142, 2016
一般社団法人 日本MRS
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詳細情報 詳細情報について
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- CRID
- 1390282680488604928
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- NII論文ID
- 130005126133
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- ISSN
- 21881650
- 13823469
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可