| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2009-10-15 |
| タイトル |
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タイトル |
Effect of suppression of local distortion on the magnetic, electrical, and thermal transport |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Matsukawa, M
Chiba, M
Kikuchi, E
Suryanarayanan, R
Apostu, M
Nimori, M
Sugimoto, K
Kobayashi, N
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| 著者(機関) |
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|
値 |
Department of Materials Science and Technology, Iwate University |
| 著者(機関) |
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値 |
Department of Materials Science and Technology, Iwate University |
| 著者(機関) |
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値 |
Department of Materials Science and Technology, Iwate University |
| 著者(機関) |
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値 |
Laboratoire de Physico-Chimie de L’Etat Solide |
| 著者(機関) |
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値 |
Laboratoire de Physico-Chimie de L’Etat Solide |
| 著者(機関) |
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値 |
National Institute for Materials Science |
| 著者(機関) |
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値 |
X-Ray Research Laboratory, Rigaku Corporation |
| 著者(機関) |
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値 |
Institute for Materials Research, Tohoku University |
| 登録日 |
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日付 |
2009-10-15 |
| 書誌情報 |
PHYSICAL REVIEW B
巻 72,
号 22,
p. 224422-1-224422-8,
発行日 2005-01-01
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| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1098-0121 |
| Abstract |
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内容記述タイプ |
Other |
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内容記述 |
We have investigated magnetic, electrical, and thermal transport properties (Seebeck effect and thermal conductivity) of LaSr2Mn2−yCryO7 polycrystalline samples ( y=0.1 , 0.2, 0.4, and 0.6). The Cr3+ substitution for Mn3+ sites causes a removal of dx2−y2 orbital of eg electron, resulting in a volume shrinkage of the lattice. Magnetic measurements reveal the appearance of a glassy behavior for Cr-doped samples, accompanied by both a collapse of the A-type antiferromagnetic structure and the growth of ferromagnetic clusters. Cr-doping effect on electrical transport strongly enhances an insulating behavior over a wide range of temperatures, while it suppresses a local minimum of thermoelectric power at lower temperatures. For all polycrystalline samples with Cr substitution, the variable-range-hopping conduction model gives a reasonable fit to both resistivities and Seebeck coefficients. The phonon thermal conduction gradually rises with increasing Cr content, which is in contrast to a typical impurity effect on thermal conductivity. We attribute this to a suppression of local lattice distortion through the introduction of Jahn-Teller inactive ions of Cr3+ . |
| 出版者 |
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出版者 |
The American Physical Society |
| 権利 |
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権利情報 |
©2005 The American Physical Society |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevB.72.224422 |
| 著者版フラグ |
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出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
prb-v72n22p224422.pdf (235.3 kB)
