Influence of phonon focusing on the Knudsen flow of phonon gas in single-crystal nanofilms of spintronic materials / Kuleyev I. I.,Bakharev S. M.,Kuleyev I. G.,Ustinov V. V. // PHYSICS OF METALS AND METALLOGRAPHY. - 2017. - V. 118, l. 4. - P. 316-327.

ISSN/EISSN:

0031-918X / 1555-6190

Type:

Article

Abstract:

Influence of the anisotropy of elastic energy on the phonon transport has been investigated in single-crystal nanofilms of Fe, Cu, MgO, InSb, and GaAs materials used for spintronic instruments and devices in the Knudsen flow regime of phonon gas. The dependences of the lattice thermal conductivity and lengths of free paths of phonons for all acoustic modes on the geometric parameters of the films have been considered for low temperatures with the dominance of the diffuse scattering of phonons at the boundaries. Physical aspects of the propagation of phonon modes in the films have been analyzed. It has been shown that the anisotropy of phonon transport in single-crystal films is due to the features of the propagation of phonon modes in elastically anisotropic films with a different relationship of the geometric parameters. The directions of heat flow and orientations of the film planes that yield the maximum and minimum thermal conductivity of phonons in film planes have been determined.

Author keywords:

spintronics; nanofilms; thermal conductivity; phonon-boundary scattering BOUNDARY SCATTERING REGIME; GIANT MAGNETORESISTANCE; THERMAL-CONDUCTIVITY; ROOM-TEMPERATURE; SILICON LAYERS; CUBIC-CRYSTALS; SUPERLATTICES; HEAT; ANISOTROPY; TRANSPORT

DOI:

10.1134/S0031918X17040068

Web of Science ID:

ISI:000401084800002

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	APR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1555-6190
Keywords-Plus	BOUNDARY SCATTERING REGIME; GIANT MAGNETORESISTANCE; THERMAL-CONDUCTIVITY; ROOM-TEMPERATURE; SILICON LAYERS; CUBIC-CRYSTALS; SUPERLATTICES; HEAT; ANISOTROPY; TRANSPORT
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	kuleev@imp.uran.ru
ResearcherID-Numbers	Kuleyev, Ivan/K-1742-2013 Ustinov, Vladimir/G-7501-2011
ORCID-Numbers	Kuleyev, Ivan/0000-0001-9428-6502 Ustinov, Vladimir/0000-0002-5155-7947
Funding-Acknowledgement	Federal Agency of Scientific Organizations of the Russian Federation {[}01201463330]; Ural Branch of the Russian Academy of Sciences {[}15- 17- 2-17]; Ministry of Education and Science of the Russian Federation {[}14.Z50.31.0025]
Funding-Text	This work was performed within a State Assignment of the Federal Agency of Scientific Organizations of the Russian Federation (theme ``Spin{''} no. 01201463330) and was supported by a Program of the Ural Branch of the Russian Academy of Sciences (project no. 15-17-2-17) and the Ministry of Education and Science of the Russian Federation (grant no. 14.Z50.31.0025).
Number-of-Cited-References	36
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	EU5PM