Chemical Tuning of Structure, Magnetization, and Conductivity in the Self-doped Double-Perovskite (Sr2-xCax)FeMoO6 (0 ≤ x ≤ 2.0) System | Zendy

TingShan Chan | Zendy; RuShi Liu | Zendy; G. Y. Guo | Zendy; Shen Hu | Zendy; J. G. Lin | Zendy; JinMing Chen | Zendy; J. Paul Attfield | Zendy

Open Access

Chemical Tuning of Structure, Magnetization, and Conductivity in the Self-doped Double-Perovskite (Sr₂_-_xCa_x)FeMoO₆ (0 ≤ x ≤ 2.0) System

Author(s) -

TingShan Chan,

RuShi Liu,

G. Y. Guo,

Shen Hu,

J. G. Lin,

JinMing Chen,

J. Paul Attfield

Publication year - 2002

Publication title -

chemistry of materials

Language(s) - English

Resource type - Journals

eISSN - 1520-5002

pISSN - 0897-4756

DOI - 10.1021/cm020773h

Subject(s) - magnetization , materials science , conductivity , crystal structure , condensed matter physics , perovskite (structure) , doping , electrical resistivity and conductivity , electronic band structure , analytical chemistry (journal) , nuclear magnetic resonance , crystallography , chemistry , magnetic field , physics , chromatography , quantum mechanics

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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