• Landau mean-field model with the cubic term for the $\alpha–\beta$ transition in quartz

• # Fulltext

https://www.ias.ac.in/article/fulltext/boms/043/0156

• # Keywords

Landau model; $\alpha–\beta$ transition; quartz.

• # Abstract

Thermodynamic quantities are calculated as a function of temperature by using Landau mean-field model for the $\alpha–\beta$ transition in quartz. By expanding the Gibbs free energy in terms of the order parameter ($Q$) with the cubic term ($Q_3$), the temperature dependence of the relevant thermodynamic quantities are predicted using the heat capacity ($C_{\rm P}$), which is fitted to the experimental data from the literature for the $\alpha–\beta$ transition in quartz. Our results indicate that the Landau mean-field model is adequate to describe the first-order $\alpha–\beta$ transition in quartz.

• # Author Affiliations

1. Department of Physics, Middle East Technical University, 06531 Ankara, Turkey
2. Vocational School of Health, Ba¸skent University, 06790 Ankara, Turkey

• # Bulletin of Materials Science

Volume 44, 2021
All articles
Continuous Article Publishing mode

• # Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020