Metallic State and Negative Permittivity in LaCo1-xNixO3 Ceramics

Zaixin Wei1

Gongyu Zhang1

Xiaoting Song1

Yingjie Wang1

Hengtong Wang1

Muqi Gao1

Huanrong Tian1

Wenjun Cai1

Yao Liu1, Email

Zhongyang Wang2, Email

Zidong Zhang1, Email

Runhua Fan3

1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, China 
2State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
3College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China


The development of epsilon-negative materials is essential for many applications in smart electronics and modern information technology because of their enticing properties. Numerous efforts have been done in terms of diluted metal. However, no more attempt has been made from increasing electron density. And the effect of doping on negative permittivity is still unclear. In this work, mono-phase LaCo1-xNixO3 ( =0.06, 0.1, 0.12, 0.16, 0.2) was prepared through a sol-gel technique and subsequent sintering. Electronic structure, electrical properties, and negative permittivity properties are investigated in detail, and the correlation between electrical conductivity and negative permittivity is elaborated in terms of electrodynamics.

Metallic State and Negative Permittivity in LaCo1-xNixO3 Ceramics