Chen, KaiHuang, ChenxiZhang, XiruiYu, YuanlieLau, KennyHu, WanbiaoLi, QianWang, JianLin, WeiweiLiu, JunmingQiu, LiZhu, JinsongWithers, Ray L.2015-09-252015-09-250021-8979http://hdl.handle.net/1885/15704Real 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, and suppressed by the short-range hop of these quasi-particles, while their long-range movement are for bulk electronic polarization above 151 K.This work was supported by the National Natural Science Foundation of China (Grant No. 11004106) and the National 973 Project (Nos. 2011CB922101 and 2009CB623303).http://www.sherpa.ac.uk/romeo/issn/0021-8979..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 25/09/15). Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in (Chen, Kai, et al. "Negative magnetodielectric effect in CaCu3Ti4O12." Journal of Applied Physics 114.23 (2013): 234104.) and may be found at https://doi.org/10.1063/1.48518152013-12-1910.1063/1.48518152015-12-11