Structural and Optical Properties of Samples SrTi\(_{1-x}\)M\(_{x}\)O\(_3\) (M = Co, Ni) Synthesized by Sol-gel Method

Doan Thi Thuy Phuong; Nguyen Van Minh; Chu Tien Dung

doi:10.15625/0868-3166/23/3/3373

Author affiliations

Authors

Doan Thi Thuy Phuong University of Transport and Communication, Lang Thuong, Dong Da, Hanoi
Nguyen Van Minh Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
Chu Tien Dung Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam

DOI:

https://doi.org/10.15625/0868-3166/23/3/3373

Keywords:

SrTiO3, sol-gel, the absorption spectra, Raman spectra, band structure, the density of states (DOS) ), the high spin state (HS), low spin state (LS)

Abstract

By sol-gel method, we synthesized SrTi\(_{1-x}\)M\(_{x}\)O\(_3\) (M = Co, Ni; x = 0.0; 0.1; 0.2; 0.3; 0.4; 0.5) nano particles and investigated structure of Raman spectrum, absorption spectra, structural diagram of energy area and their density of states. The results showed that the average size of nanoparticles was about 10-30 nm. Absorption edge of each sample depended on the content of substitution of Co, Ni. Besides, the content of ion substitution also had influence on the structure, Raman spectrum, structural diagram of energy area and state density of samples. The results indicated that Co and Ni ions were substituted for position of Ti in the net cell, which changed structure of the material and reduced band gap of the synthesized materials and increases its conductivity.

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