Colossal dielectric constants in transition-metal oxides

被引：438

作者：

Lunkenheimer, P. ^{[1
]}

Krohns, S. ^{[1
]}

Riegg, S.

Ebbinghaus, S. G. ^{[2
]}

Reller, A.

Loidl, A. ^{[1
]}

机构：

[1] Univ Augsburg, Ctr Elect Correlat & Magnetism, D-86135 Augsburg, Germany

[2] Univ Halle Wittenberg, D-06120 Halle, Germany

来源：

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2010年 / 180卷

关键词：

AC-CONDUCTIVITY; PHASE-SEPARATION; MAGNETIC-PROPERTIES; LAYER CAPACITORS; CHARGE STRIPES; CACU3TI4O12; PERMITTIVITY; TEMPERATURE; INSULATOR; DYNAMICS;

D O I：

10.1140/epjst/e2010-01212-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Many transition-metal oxides show very large ("colossal") magnitudes of the dielectric constant and thus have immense potential for applications in modern microelectronics and for the development of new capacitance-based energy-storage devices. In the present work, we thoroughly discuss the mechanisms that can lead to colossal values of the dielectric constant, especially emphasising effects generated by external and internal interfaces, including electronic phase separation. In addition, we provide a detailed overview and discussion of the dielectric properties of CaCu3Ti4O12 and related systems, which is today's most investigated material with colossal dielectric constant. Also a variety of further transition-metal oxides with large dielectric constants are treated in detail, among them the system La(2-x)SrxNiO(4) where electronic phase separation may play a role in the generation of a colossal dielectric constant.

引用

页码：61 / 89

页数：29

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