Thermophysical properties of iridium at finite temperature

doi:10.1088/1674-1056/25/11/116401

中国物理B ›› 2016, Vol. 25 ›› Issue (11): 116401-116401.doi: 10.1088/1674-1056/25/11/116401

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Thermophysical properties of iridium at finite temperature

Priyank Kumar, N K Bhatt, P R Vyas, V B Gohel

1 Department of Science, Government Polytechnic, Gandhinagar 382024, Gujarat, India;
2 Department of Physics, Sardar Patel University, Vallabh Vidyanagar 388120, Gujarat, India;
3 Department of Physics, School of Science, Gujarat University, Ahmedabad 380009, Gujarat, India

收稿日期:2016-06-15 修回日期:2016-09-30 出版日期:2016-11-05 发布日期:2016-11-05
通讯作者: Priyank Kumar E-mail:priyankkumar2007@yahoo.co.in
基金资助:
Project supported by the Department of Science and Technology-Fund for Improvement of Science and Technology Infrastructure Project (DST-FIST) (Level 1) of Department of Sciences and Technology (DST), New Delhi (Grant No. SR/FST/PST-001/2006).

Thermophysical properties of iridium at finite temperature

Priyank Kumar¹, N K Bhatt², P R Vyas³, V B Gohel³

1 Department of Science, Government Polytechnic, Gandhinagar 382024, Gujarat, India;
2 Department of Physics, Sardar Patel University, Vallabh Vidyanagar 388120, Gujarat, India;
3 Department of Physics, School of Science, Gujarat University, Ahmedabad 380009, Gujarat, India

Received:2016-06-15 Revised:2016-09-30 Online:2016-11-05 Published:2016-11-05
Contact: Priyank Kumar E-mail:priyankkumar2007@yahoo.co.in
Supported by:
Project supported by the Department of Science and Technology-Fund for Improvement of Science and Technology Infrastructure Project (DST-FIST) (Level 1) of Department of Sciences and Technology (DST), New Delhi (Grant No. SR/FST/PST-001/2006).

摘要/Abstract

摘要：

The bulk properties of materials in an extreme environment such as high temperature and high pressure can be understood by studying anharmonic effects due to the vibration of lattice ions and thermally excited electrons. In this spirit, in the present paper, anharmonic effects are studied by using the recently proposed mean-field potential (MFP) approach and Mermin functional which arise due to the vibration of lattice ions and thermally excited electrons, respectively. The MFP experienced by a wanderer atom in the presence of surrounding atoms is constructed in terms of cold energy using the local form of the pseudopotential. We have calculated the temperature variation of several thermophysical properties in an extreme environment up to melting temperature. The results of our calculations are in excellent agreement with the experimental findings as well as the theoretical results obtained by using first principle methods. We conclude that presently used conjunction scheme (MFP+pseudopotential) is simple computationally, transparent physically, and accurate in the sense that the results generated are comparable and sometimes better than the results obtained by first principle methods. Local pseudopotential used is transferable to extreme environment without adjusting its parameters.

关键词: iridium, mean-field potential, anharmonic effects, thermophysical properties

Abstract:

Key words: iridium, mean-field potential, anharmonic effects, thermophysical properties

中图分类号: (Equations of state of pure metals and alloys)

64.30.Ef

65.40.Ba (Heat capacity) 65.40.De (Thermal expansion; thermomechanical effects)

Priyank Kumar, N K Bhatt, P R Vyas, V B Gohel. Thermophysical properties of iridium at finite temperature[J]. 中国物理B, 2016, 25(11): 116401-116401.

Priyank Kumar, N K Bhatt, P R Vyas, V B Gohel. Thermophysical properties of iridium at finite temperature[J]. Chin. Phys. B, 2016, 25(11): 116401-116401.

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Thermophysical properties of iridium at finite temperature

Thermophysical properties of iridium at finite temperature

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