Synthesis and characterization of multiferroic BiMn7O12

被引：53

作者：

Mezzadri, F. ^{[1
]}

Calestani, G. ^{[1
,4
]}

Calicchio, M. ^{[4
]}

Gilioli, E. ^{[4
]}

Bolzoni, F. ^{[4
]}

Cabassi, R. ^{[4
]}

Marezio, M. ^{[2
]}

Migliori, A. ^{[3
]}

机构：

[1] Univ Parma, Dipartimento Chim GIAF, I-43100 Parma, Italy

[2] CRETA CNRS, F-38042 Grenoble 9, France

[3] CNR IMM, I-40126 Bologna, Italy

[4] CNR, IMEM, Area Sci, I-43100 Parma, Italy

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 10期

关键词：

antiferromagnetic materials; bismuth compounds; crystal growth; crystal structure; electric moments; ferroelectric materials; magnetic transition temperature; multiferroics; permittivity; space groups; CHARGE; FERROELECTRICITY;

D O I：

10.1103/PhysRevB.79.100106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the high-pressure synthesis of BiMn7O12, a manganite displaying a "quadruple-perovskite" structure. Structural characterization of single-crystal samples shows a distorted and asymmetrical coordination around the Bi atom due to presence of the 6s(2) lone pair, resulting in noncentrosymmetric space group Im, leading to a permanent electrical dipole moment and ferroelectric properties. On the other hand, magnetic characterization reveals antiferromagnetic transitions in agreement with the isostructural compounds, and the dielectric constant shows anomalies matching the magnetic transition temperatures. BiMn7O12 is therefore a promising multiferroic material, with evidence of coupling between magnetic and dielectric properties.

引用

页数：4

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