Effect of antiferromagnetic order on the dielectric properties of Bi2Fe4O9

被引：44
作者：
Park, Y. A. [1 ]
Song, K. M. [1 ]
Lee, K. D. [1 ]
Won, C. J. [1 ]
Hur, N. [1 ]
机构：
[1] Inha Univ, Dept Phys, Inchon 402751, South Korea
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 09期
关键词：
antiferromagnetism; bismuth compounds; dielectric materials; magnetic anisotropy; magnetic transition temperature; permittivity; ANOMALIES; POLARIZATION; BAMNF4; CR2O3;
D O I：
10.1063/1.3339880
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigated the dielectric and magnetic properties of Bi2Fe4O9 single crystals. The dielectric anomalies observed at the magnetic transition temperature indicate that there is a strong coupling between the magnetic and dielectric properties. The anisotropic magnetic contribution of the dielectric constant is discussed in terms of the spin correlation function, << S-i center dot S-j >>, below the antiferromagnetic transition at 240 K.
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页数：3
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