Relaxor behavior in multiferroic BiMn2 O5

Autores

  • Igor Fier Universidade Estadual Paulista

Palavras-chave:

Thermal stimulated depolarization current, Physics

Resumo

In polycrystalline BiMn2 O5 a broad thermal stimulated depolarization current (TSDC) curve has been observed in the range from 10 K to 300 K and the pyroelectric coefficient determined. In magnetic susceptibility measurements reported in the literature, features appearing in the pyroelectric coefficient could also be identified for the same temperatures, suggesting a connection between electric and magnetic data above the Néel temperature. A detailed study of the dielectric constant from 240 K to 700 K for an extended range of frequencies revealed a broad maximum at low frequencies, characteristic of relaxor ferroelectrics, following Vogel-Fulcher relation. A freezing temperature of the polar nanoregions Tf = 512 K has been determined. This high temperature ferroelectric behavior is attributed to the Bi3+ in the distorted BiO8 cage.

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Biografia do Autor

Igor Fier , Universidade Estadual Paulista

Universidade Estadual Paulista

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Como Citar

FIER , I. . Relaxor behavior in multiferroic BiMn2 O5 . Physicae Proceedings, Campinas, SP, v. 1, n. 1, p. 1–1, 2020. Disponível em: https://econtents.bc.unicamp.br/eventos/index.php/phyproceedings/article/view/3246. Acesso em: 4 fev. 2023.