Negative magnetodielectric effect in CaCu3Ti4O12

被引：13

作者：

Chen, Kai ^{[1
,2
,3
]}

Huang, Chenxi ^{[1
]}

Zhang, Xirui ^{[1
]}

Yu, Yuanlie ^{[3
]}

Lau, Kenny ^{[3
]}

Hu, Wanbiao ^{[3
]}

Li, Qian ^{[3
]}

Wang, Jian ^{[3
]}

Lin, Weiwei ^{[2
]}

Liu, Junming ^{[2
,4
]}

Qiu, Li ^{[2
]}

Zhu, Jinsong ^{[2
]}

Withers, Ray L. ^{[3
]}

机构：

[1] Nanjing Univ Sci & Technol, Dept Phys, Nanjing 210094, Jiangsu, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia

[4] Chinese Acad Sci, China & Int Ctr Mat Phys, Shenyang 110016, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 114卷 / 23期

基金：

中国国家自然科学基金;

关键词：

HIGH-DIELECTRIC-CONSTANT; ISING-MODEL ANALYSIS; MAGNETIC-STRUCTURES; POLARIZATION; BEHAVIOR;

D O I：

10.1063/1.4851815

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Real part of complex relative dielectric value is relatively decreased as large as similar to 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. (C) 2013 AIP Publishing LLC.

引用

页数：6

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