Spin, charge, and orbital ordering in the B-site diluted manganates La2-xSrxGaMnO6

被引：10

作者：

Battle, PD

Blundell, SJ

Claridge, JB

Coldea, AI

Cussen, EJ

Noailles, LD

Rosseinsky, MJ

Singleton, J

Sloan, J

机构：

[1] Univ Oxford, Inorgan Chem Lab, Dept Chem, Oxford OX1 3QR, England

[2] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

[3] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

来源：

CHEMISTRY OF MATERIALS | 2002年 / 14卷 / 01期

关键词：

D O I：

10.1021/cm0103848

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：

Oxidation of the ferromagnetic B-site diluted manganese(III) perovskite La2GaMnO6 is investigated by synthesis of the La2-xSrxGaMnO6 series. At the x = 0.3 composition, which corresponds to diamagnetic element substitution at the B-site of metallic La0.7Sr0.3MnO3, the Mn-III and Mn-IV valences order in real space at low temperature with an unusual lamellar motif. Orbital ordering at the Mn-III centers in this array maintains ferromagnetism and enhances the static coherent Jahn-Teller distortion over that found for the pure Mn-III end-member, facilitating e(g) electron hopping in the insulating state. Further oxidation to x = 0.5 completely suppresses the charge and orbital ordering, leading to glassy rather than long-range ordered magnetism.

引用

页码：425 / 434

页数：10

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[11] HIGH-DENSITY SITE PERCOLATION ON REAL LATTICES [J].