Effect of phonon focusing on Knudsen flow of phonon gas in single-crystal nanowires made of spintronics materials / Kuleev I. I.,Bakharev S. M.,Kuleev I. G.,Ustinov V. V. // PHYSICS OF METALS AND METALLOGRAPHY. - 2017. - V. 118, l. 1. - P. 10-20.

ISSN/EISSN:

0031-918X / 1555-6190

Type:

Article

Abstract:

Effect of anisotropy of elastic energy on the phonon propagation in single-crystal nanowires made of Fe, Cu, MgO, InSb, and GaAs materials that are used to fabricate spintronics devices in the regime of the Knudsen flow of phonon gas has been studied. A new method of analyzing the focusing of quasi-transverse modes has been suggested, which made it possible to determine the average values of the densities of phonon states in the regions of focusing and defocusing slow and fast quasi-transverse modes. The effect of phonon focusing on the anisotropy of heat conductivity and lengths of the phonon free paths has been analyzed for all acoustic modes that exist in spintronics nanostructures. It has been shown that for all the nanowires investigated the angular dependences of the free paths of fast and slow transverse modes in the \{100\} and \{110\} planes correlate with the angular dependences of the densities of phonon states for these modes. Directions of the heat flux that ensure the maximum and minimum phonon heat conductivity in the nanowires have been determined.

Author keywords:

spintronics; nanowires; heat conductivity; boundary scattering of phonons BOUNDARY SCATTERING REGIME; GIANT MAGNETORESISTANCE; THERMAL-CONDUCTIVITY; ROOM-TEMPERATURE; CUBIC-CRYSTALS; SUPERLATTICES; SILICON; HEAT; ANISOTROPY; TRANSPORT

DOI:

10.1134/S0031918X17010033

Web of Science ID:

ISI:000395027200002

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JAN
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; CUBIC-CRYSTALS; SUPERLATTICES; SILICON; 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	Ural Division, 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 in the framework of the State Task of the Federal Agency for Scientific Organizations of the Russian Federation (theme ``Spin,{''} no. 01201463330) and was supported in part by the Program of the Ural Division, Russian Academy of Sciences (project no 15-17-2-17) and by the Ministry of Education and Science of the Russian Federation (grant no. 14.Z50.31.0025).
Number-of-Cited-References	31
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	EM0SE