Designed ferromagnetic, ferroelectric Bi2NiMnO6

被引：393

作者：

Azuma, M ^{[1
]}

Takata, K

Saito, T

Ishiwata, S

Shimakawa, Y

Takano, M

机构：

[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[2] Japan Sci & Technol Agcy, JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 24期

关键词：

D O I：

10.1021/ja0512576

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A newly designed ferromagnetic, ferroelectric compound, Bi2NiMnO6, was prepared by highpressure synthesis at 6 GPa. The crystal structure, as determined by synchrotron X-ray powder diffraction, is a heavily distorted double perovskite with Ni2+ and Mn4+ ions ordered in a rock-salt configuration. The presence of 6s(2) lone pairs of Bi3+ ions and the covalent Bi-O bonds give ferroelectric properties with T-CE of 485 K, while -Ni2+-O- Mn4+-O-Ni2+- magnetic paths lead to a ferromagnetism with T-CM of 140 K. This simple material design to distribute two magnetic elements with and without e(g) electrons on B sites of Bi- and Pb-based perovkites can be applied to other Bi2M2+M-'4+O-6 and Pb2M3+ M'5+O6 systems to search for newer ferromagnetic ferroelectrics.

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页码：8889 / 8892

页数：4

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