Magnetodielectric Effects from Spin Fluctuations in Isostructural Ferromagnetic and Antiferromagnetic Systems

2003/05/14 by G. Lawes, A. P. Ramirez, C. M. Varma +1 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevlett.91.257208

15 pages, 3 figures

arxiv created 2003/05/14 · openalex publication_date 2003/12/18 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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.

Citations

• Colossal magnetoresistance

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