Colossal dielectric constants in transition-metal oxides

By P. Lunkenheimer, S. Krohns, S. Riegg, S. Ebbinghaus, A. Reller, A. Loidl. 2009

456 citations recorded by the source corpus.

Abstract. 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 La2−xSrxNiO4 where electronic phase separation may play a role in the generation of a colossal dielectric constant.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/6ab8c0f8321e6642318cda7794119388840b7361

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In Materials Chemistry

1. Daljeet Kaur
2. Tripti Sharma
3. C. Madhu
4. Amardeep Bharti

Citations in the corpus

• Dielectric Properties of ZnO-Based Nanocomposites and Their Potential Applications (2021, background): “Metal oxides possess a high dielectric constant along with low dielectric loss, thus having huge potential to be used in microelectronics industry [22, 23].”