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Phase separation in Y1-xCaxTiO3 associated with the insulator-to-metal transition : Observation by transmission electron microscopy

https://hiroshima.repo.nii.ac.jp/records/2008241
https://hiroshima.repo.nii.ac.jp/records/2008241
08cf4e33-ece2-4be3-8b48-c1718249cf13
名前 / ファイル ライセンス アクション
PhysRevB_70_134109.pdf PhysRevB_70_134109.pdf (311.3 KB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Phase separation in Y1-xCaxTiO3 associated with the insulator-to-metal transition : Observation by transmission electron microscopy
言語 en
作成者 Matsuhata, Hirofumi

× Matsuhata, Hirofumi

en Matsuhata, Hirofumi

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Iga, Fumitoshi

× Iga, Fumitoshi

en Iga, Fumitoshi

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Tsubota, Masami

× Tsubota, Masami

en Tsubota, Masami

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Nakano, Toshihiro

× Nakano, Toshihiro

en Nakano, Toshihiro

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Takabatake, Toshiro

× Takabatake, Toshiro

en Takabatake, Toshiro

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Kato, Kenichi

× Kato, Kenichi

en Kato, Kenichi

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 Copyright (c) 2005 American Physical Society.
内容記述
内容記述 Structural changes in Y1-xCaxTiO3 (x=0.37, 0.39 and 0.41) during a transition from an insulator-to-metal were investigated by transmission electron microscopy. In a specimen for x=0.39, on cooling a transition from orthorhombic to monoclinic lattice was observed first. The onset of this transition was not certain, but the monoclinic lattice was clearly observed at 170 K. On further cooling to 140 K, approximately the metalinsulator transition temperature, an introduction of strain to this monoclinic phase was observed. Below 140 K a state of phase separation, with growth of domains, was observed. In the insulator specimen for x=0.37 the transition from orthorhombic to monoclinic lattice was observed similarly to the case of x=0.39, but no phase separation was observed in the range from room temperature to 110 K. In the case for x=0.41, the phase separation was also observed on cooling, but transition temperature of the phase separation is lower than that reported by x-ray diffraction. The phase separation observed presently for 0.39 and 0.41 is considered to be a kind of electrical phase separation, which drives the appearance of the metallic state at low temperatures. This is the first report on observation of separated domains on the electrical phase separation associated with the metal-insulator transition in paramagnetic Y1-xCaxTiO3.
言語 en
出版者
出版者 American Physical Society
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
識別子タイプ DOI
関連識別子 10.1103/PhysRevB.70.134109
関連情報
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1103/PhysRevB.70.134109
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0163-1829
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AA11187113
開始ページ
開始ページ 134109-1
書誌情報 Physical Review B - Condensed Matter and Materials Physics
Physical Review B - Condensed Matter and Materials Physics

巻 70, 号 13, p. 134109-1-134109-6, 発行日 2004-10-26
旧ID 18720
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