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

被引：27

作者：

Chan, TS

Liu, RS ^{[1
]}

Guo, GY

Hu, SF

Lin, JG

Chen, JM

Attfield, JP

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 10764, Taiwan

[2] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan

[3] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10764, Taiwan

[4] Natl Nano Device Labs, Hsinchu, Taiwan

[5] Synchrotron Radiat Res Ctr, Hsinchu, Taiwan

[6] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

CHEMISTRY OF MATERIALS | 2003年 / 15卷 / 02期

关键词：

D O I：

10.1021/cm020773h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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 (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 4mu(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.

引用

页码：425 / 432

页数：8

共 32 条

[11] Large room-temperature intergrain magnetoresistance in double perovskite SrFe1-x(Mo or Re)xO3 [J].