Issue 25, 2022, Issue in Progress
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RSC Advances

Structural, optical and conductivity properties in tetragonal BaTi1−xCoxO3 (0≤ x ≤0.1)

L. T. H. Phong,a   N. T. Dang,bc   N. V. Dang,di   Van-Quynh Nguyen,e   D. H. Manh, ORCID logo a   P. H. Nam,af   L. H. Nguyengh  and  P. T. Phong ORCID logo *gh  

* Corresponding authors

a Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi, Vietnam

b Institute of Research and Development, Duy Tan University, Da Nang, Vietnam

c Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam

d Department of Physics and Technology, Thai Nguyen University of Science, Thai Nguyen City, Vietnam

e University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, Ha Noi, Vietnam

f Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam

g Laboratory of Magnetism and Magnetic Materials, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Vietnam
E-mail: phamthanhphong@vlu.edu.vn

h Faculty of Technology, Van Lang University, Ho Chi Minh City, Vietnam

i Hong Duc University, Thanh Hoa, Vietnam

Abstract

This work investigates the structure, optical and electrical conductivity properties of BaTi1−xCoxO3 (0≤ x ≤0.1) ceramics prepared by the hydrothermal method. The X-ray diffraction and Raman scattering analysis demonstrates that the prepared samples have a single-phase tetragonal structure with P4mm symmetry. The UV-vis diffuse reflectance spectrum confirms the influence of Co concentration on the direct optical band gap of BaTi1−xCoxO3 ceramics. The optical band gap shifts from 3.14 eV to 3.44 eV as the Co concentration increases from 0 to 0.1. The dielectric constant increases with the depletion of frequency according to the Maxwell–Wagner and Koops model. The AC conductivity versus frequency curve indicates that the conduction mechanism is determined by using the correlated barrier hopping (CBH) model. The Cole–Cole plot of the complex impedance was investigated for the prepared samples. The compounds showed dielectric relaxation of the non-Debye type.

Graphical abstract: Structural, optical and conductivity properties in tetragonal BaTi1−xCoxO3 (0≤ x ≤0.1)

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Article information

DOI
https://doi.org/10.1039/D2RA01411D
Article type
Paper
Submitted
03 Mar 2022
Accepted
24 May 2022
First published
30 May 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 16119-16130

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Structural, optical and conductivity properties in tetragonal BaTi1−xCoxO3 (0≤ x ≤0.1)

L. T. H. Phong, N. T. Dang, N. V. Dang, V. Nguyen, D. H. Manh, P. H. Nam, L. H. Nguyen and P. T. Phong, RSC Adv., 2022, 12, 16119 DOI: 10.1039/D2RA01411D

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