Magnetodielectric effects from spin fluctuations in isostructural ferromagnetic and antiferromagnetic systems

被引：217

作者：

Lawes, G

Ramirez, AP

Varma, CM

Subramanian, MA

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA

[3] DuPont Co Inc, Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.91.257208

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the effects of spin fluctuations, magnetic ordering, and external magnetic field on the dielectric constant of the ferromagnet SeCuO3, and the antiferromagnet TeCuO3. A model based on the coupling between uniform polarization and the q-dependent spin-spin correlation function is presented to explain the different behaviors for these isostructural compounds. The large magnetocapacitance near the transition temperature in the ferromagnet SeCuO3 suggests routes to enhancing the magnetodielectric response for practical applications.

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页数：4

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