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Negative magnetodielectric effect in CaCu₃Ti₄O₁₂

Chen, Kai; Huang, Chenxi; Zhang, Xirui; Yu, Yuanlie; Lau, Kenny; Hu, Wanbiao; Li, Qian; Wang, Jian; Lin, Weiwei; Liu, Junming; Qiu, Li; Zhu, Jinsong; Withers, Ray L.


Real part of complex relative dielectric value is relatively decreased as large as  ∼5 % from 50 K to 200 K in CaCu₃Ti₄O₁₂, by applying a 6-T static magnetic field. CaCu₃Ti₄O₁₂ is thus implied primarily by the negative magnetodielectric effect, as a unified dielectric system in which 1-D finite dipole chains of B-site titanium ions, coexist with a collective of polaron-like 3d-electrons of A-site copper ions: the dipole chains are thermally activated for lattice ionic polarization above 50 K,...[Show more]

CollectionsANU Research Publications
Date published: 2013-12-19
Type: Journal article
Source: Journal of Applied Physics
DOI: 10.1063/1.4851815


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