Chemical tuning of structure, magnetization, and conductivity in the self-doped double-perovskite (Sr2-xCax)FeMoO6 (0 ≤ x ≤ 2.0) System

T. S. Chan; R. S. Liu; G. Y. Guo; S. F. Hu; J. G. Lin; J. M. Chen; J. P. Attfield

doi:10.1021/cm020773h

Chemical tuning of structure, magnetization, and conductivity in the self-doped double-perovskite (Sr_2-xCa_x)FeMoO₆ (0 ≤ x ≤ 2.0) System

T. S. Chan, R. S. Liu^*, G. Y. Guo, S. F. Hu, J. G. Lin, J. M. Chen, J. P. Attfield

^*此作品的通信作者

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

18 引文斯高帕斯（Scopus）

摘要

The variations of crystal structure, magnetization, and conductivity resulting from the chemical pressure effects of substituting Sr²⁺ by the smaller Ca²⁺ in the double-perovskite (Sr_2-xCa_x)FeMoO₆ have been investigated. An increase in the Ca content leads to an increase in the Fe/Mo ordering in the materials, which raises the magnetic moments close to the theoretical value of 4, μ_B. An increase in conductivity with increasing Ca content is also found and is consistent with an increase in (Fe²⁺ + Mo⁶⁺)/(Fe³⁺ + Mo⁵⁺) band overlap rather than bandwidth changes. The changes observed by physical measurements are supported by the X-ray absorption near-edge structures of Fe and Mo and by band structure calculations.

原文	英語
頁（從 - 到）	425-432
頁數	8
期刊	Chemistry of Materials
卷	15
發行號	2
DOIs	https://doi.org/10.1021/cm020773h
出版狀態	已發佈 - 2003 1月
對外發佈	是

ASJC Scopus subject areas

一般化學
一般化學工程
材料化學

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10.1021/cm020773h

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title = "Chemical tuning of structure, magnetization, and conductivity in the self-doped double-perovskite (Sr2-xCax)FeMoO6 (0 ≤ x ≤ 2.0) System",

abstract = "The variations of crystal structure, magnetization, and conductivity resulting from the chemical pressure effects of substituting Sr2+ by the smaller Ca2+ in the double-perovskite (Sr2-xCax)FeMoO6 have been investigated. An increase in the Ca content leads to an increase in the Fe/Mo ordering in the materials, which raises the magnetic moments close to the theoretical value of 4, μB. An increase in conductivity with increasing Ca content is also found and is consistent with an increase in (Fe2+ + Mo6+)/(Fe3+ + Mo5+) band overlap rather than bandwidth changes. The changes observed by physical measurements are supported by the X-ray absorption near-edge structures of Fe and Mo and by band structure calculations.",

author = "Chan, {T. S.} and Liu, {R. S.} and Guo, {G. Y.} and Hu, {S. F.} and Lin, {J. G.} and Chen, {J. M.} and Attfield, {J. P.}",

year = "2003",

month = jan,

doi = "10.1021/cm020773h",

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volume = "15",

pages = "425--432",

journal = "Chemistry of Materials",

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AU - Chan, T. S.

AU - Liu, R. S.

AU - Guo, G. Y.

AU - Hu, S. F.

AU - Lin, J. G.

AU - Chen, J. M.

AU - Attfield, J. P.

PY - 2003/1

Y1 - 2003/1

N2 - The variations of crystal structure, magnetization, and conductivity resulting from the chemical pressure effects of substituting Sr2+ by the smaller Ca2+ in the double-perovskite (Sr2-xCax)FeMoO6 have been investigated. An increase in the Ca content leads to an increase in the Fe/Mo ordering in the materials, which raises the magnetic moments close to the theoretical value of 4, μB. An increase in conductivity with increasing Ca content is also found and is consistent with an increase in (Fe2+ + Mo6+)/(Fe3+ + Mo5+) band overlap rather than bandwidth changes. The changes observed by physical measurements are supported by the X-ray absorption near-edge structures of Fe and Mo and by band structure calculations.

AB - The variations of crystal structure, magnetization, and conductivity resulting from the chemical pressure effects of substituting Sr2+ by the smaller Ca2+ in the double-perovskite (Sr2-xCax)FeMoO6 have been investigated. An increase in the Ca content leads to an increase in the Fe/Mo ordering in the materials, which raises the magnetic moments close to the theoretical value of 4, μB. An increase in conductivity with increasing Ca content is also found and is consistent with an increase in (Fe2+ + Mo6+)/(Fe3+ + Mo5+) band overlap rather than bandwidth changes. The changes observed by physical measurements are supported by the X-ray absorption near-edge structures of Fe and Mo and by band structure calculations.

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Chemical tuning of structure, magnetization, and conductivity in the self-doped double-perovskite (Sr2-xCax)FeMoO6 (0 ≤ x ≤ 2.0) System

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ASJC Scopus subject areas

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Chemical tuning of structure, magnetization, and conductivity in the self-doped double-perovskite (Sr_2-xCa_x)FeMoO₆ (0 ≤ x ≤ 2.0) System