Structure determination of ferromagnetic perovskite BiMnO3

被引：302

作者：

Atou, T ^{[1
]}

Chiba, H ^{[1
]}

Ohoyama, K ^{[1
]}

Yamaguchi, Y ^{[1
]}

Syono, Y ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1999年 / 145卷 / 02期

关键词：

magnetically ordered materials; chemical synthesis; crystal structure and symmetry; exchange and superexchange; neutron scattering;

D O I：

10.1006/jssc.1999.8267

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Structure of feromagnetic BiMnO3 synthesized at high pressure has been determined by electron diffraction and neutron powder diffraction. This structure is related to a heavily distorted perovskite structure, having monoclinic symmetry, space group C2, with a = 9.5323(6) Angstrom, b = 5.6064(3) Angstrom, C = 9.8535(7) Angstrom, and beta = 110.667(5)degrees, The distortion is caused by a polarized Ri 6s(2) lone pair, Every trivalent manganese cation reveals the Jahn-Teller distortion and ordering of a vacant d(x2-y2) orbital is suggested to play an important role for the ferromagnetism. (C) 1999 Academic Press.

引用

页码：639 / 642

页数：4

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