Phonon anharmonicity of iron monosilicide / Povzner A. A.,Filanovich A. N. // PHYSICA B-CONDENSED MATTER. - 2015. - V. 456, l. . - P. 371-374.

ISSN/EISSN:

0921-4526 / 1873-2135

Type:

Article

Abstract:

A self-consistent thermodynamic model of the crystal lattice of Fe Si is developed. In the framework of this model calculations of the heat capacity, coefficient of thermal expansion and bulk modulus of Fe Si in a wide temperature range are carried out. On the basis of comparison with the experimental data, electronic contribution to the heat capacity of Fe Si is obtained, the temperature dependence of which is caused by the insulator to metal transition, accompanied by disappearance of the energy gap in the electronic spectrum. We have found strong phonon anharmonicity of Fe Si, which is manifested in substantial reduction of the Debye temperature and Gruneisen parameter with increasing temperature. The obtained values for the Gruneisen parameter of the crystal lattice of Fe Si correlate with the estimations of the Gruneisen parameters for individual branches of the phonon spectrum of Fe Si measured in neutron and synchrotron experiments. (C) 2014 Elsevier B.V. All rights reserved.

Author keywords:

Iron silicides; Thermodynamic properties; Heat capacity; Elastic properties; Phonon anharmonicity; Thermodynamic modeling LOW-TEMPERATURE TRANSPORT; THERMODYNAMIC PROPERTIES; FESI

DOI:

10.1016/j.physb.2014.09.028

Web of Science ID:

ISI:000346841200061

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN 1
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-2135
Keywords-Plus	LOW-TEMPERATURE TRANSPORT; THERMODYNAMIC PROPERTIES; FESI
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	a.a.povzner@urfu.ru a.n.filanovich@urfu.ru
ResearcherID-Numbers	Povzner, Aleksandr/A-4625-2016
Funding-Acknowledgement	Ministry of education and science of Russian Federation {[}3.1236.2014/K]
Funding-Text	The results were obtained in the framework of the task of The Ministry of education and science of Russian Federation, contract 3.1236.2014/K.
Number-of-Cited-References	21
Usage-Count-Since-2013	12
Journal-ISO	Physica B
Doc-Delivery-Number	AX3LP