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  1. 138 物性研究所
  2. 74 国際超強磁場科学研究施設
  3. 1387410 学術雑誌論文
  1. 0 資料タイプ別
  2. 10 学術雑誌論文
  3. 014 自然科学

Magnetic-field-induced spin crossover of Y-doped Pr0.7Ca0.3CoO3

http://hdl.handle.net/2261/60904
http://hdl.handle.net/2261/60904
05bbc7b1-8706-40bb-896d-d7b529f34990
名前 / ファイル ライセンス アクション
PhysRevB.94.115129.pdf PhysRevB.94.115129.pdf (580.5 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-01-10
タイトル
タイトル Magnetic-field-induced spin crossover of Y-doped Pr0.7Ca0.3CoO3
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Ikeda, Akihiko

× Ikeda, Akihiko

WEKO 3729

Ikeda, Akihiko

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Lee, Suyeon

× Lee, Suyeon

WEKO 3730

Lee, Suyeon

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Terashima, Taku T.

× Terashima, Taku T.

WEKO 3731

Terashima, Taku T.

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Matsuda, Yasuhiro H.

× Matsuda, Yasuhiro H.

WEKO 3732

Matsuda, Yasuhiro H.

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Tokunaga, Masashi

× Tokunaga, Masashi

WEKO 3733

Tokunaga, Masashi

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Naito, Tomoyuki

× Naito, Tomoyuki

WEKO 3734

Naito, Tomoyuki

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著者所属
著者所属 Institute for Solid State Physics, University of Tokyo
著者所属
著者所属 Faculty of Science and Engineering, Iwate University
抄録
内容記述タイプ Abstract
内容記述 The family of hole-doped Pr-based perovskite cobaltites, Pr0.5Ca0.5CoO3 and (Pr1−yREy)0.3Ca0.7CoO3 (where RE is rare earth), has recently been found to exhibit simultaneous metal-insulator, spin-state, and valence transitions. We have investigated magnetic-field-induced phase transitions of (Pr1−yYy)0.7Ca0.3CoO3 by means of magnetization measurements at 4.2–100 K up to an ultrahigh magnetic field of 140 T with the chemical pressure varied by y=0.0625, 0.075, 0.1. The observed magnetic-field-induced transitions were found to occur simultaneously with the metal-insulator transitions up to 100 T. The obtained magnetic-field-temperature (B−T) phase diagram and magnetization curves are well analyzed by a spin-crossover model of a single ion with interion interactions. On the other hand, the chemical pressure dependence of the experimentally obtained magnetization change during the phase transition disagrees with the single-ion model when approaching low temperatures. The significant y dependence of the magnetization change at low temperatures may arise from the itinerant magnetism of Co3+ in the paramagnetic metallic phase, where the chemical pressure enhances the exchange splitting by promoting the double-exchange interaction. The observed B−T phase diagrams of (Pr1−yYy)0.7Ca0.3CoO3 are quite contrary to that of LaCoO3, indicating that in (Pr1−yYy)0.7Ca0.3CoO3 the high-field phase possesses higher entropy than the low-field phase, whereas it is the other way around in LaCoO3.
書誌情報 Physical Review B

巻 94, 号 11, 発行日 2016-09-13
ISSN
収録物識別子タイプ ISSN
収録物識別子 1550235X
DOI
識別子タイプ DOI
関連識別子 info:doi/10.1103/PhysRevB.94.115129
権利
権利情報 ©2016 American Physical Society
著者版フラグ
値 publisher
出版者
出版者 American Physical Society
異版である
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://dx.doi.org/10.1103/PhysRevB.94.115129
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