Superconducting properties of the atomically disordered MgB2 compound / Kar'kin AE,Voronin VI,D'yachkova TV,Kadyrova NI,Tyutyunik AP,Zubkov VG,Zainulin YG,Sadovskii MV,Goshchitskii BN // JETP LETTERS. - 2001. - V. 73, l. 10. - P. 570-572.

ISSN/EISSN:

0021-3640 / нет данных

Type:

Article

Abstract:

The effect of disorder induced by neutron irradiation in a nuclear reactor (thermal neutron fluence 1 x 10(19) cm(-2)) on the superconducting transition temperature T-c and the upper critical field H-c2 of polycrystalline MgB2 samples was investigated. Despite the appreciable radiation-induced distortions (more than ten displacements per atom), the initial crystal structure (C32) was retained. The temperature T-c decreased from 38 to 5 K upon irradiation and was practically completely restored after the subsequent annealing at a temperature of 700 degreesC. A weak change in the dH(c2)/dT derivative upon irradiation is explained by the fact that the irradiated samples are described by the ``pure{''} limit of the theory of disordered superconductors. The suppression of T-c upon disordering may be due to the isotropization of the originally anisotropic (or multicomponent) superconducting gap or to a decrease in the density of electronic states at the Fermi level. (C) 2001 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

нет данных

DOI:

10.1134/1.1387530

Web of Science ID:

ISI:000169775800016

Соавторы в МНС:

—

Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
Language	English
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
ResearcherID-Numbers	Karkin, Alexander/J-6712-2013 Goshchitskii, Boris/K-4210-2013 Voronin, Vladimir/J-7733-2013 Sadovskii, Michael/B-2387-2017
ORCID-Numbers	Karkin, Alexander/0000-0003-0464-4762 Goshchitskii, Boris/0000-0002-5292-1683 Voronin, Vladimir/0000-0002-3901-9812 Sadovskii, Michael/0000-0001-6056-8229
Number-of-Cited-References	11
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	14
Journal-ISO	Jetp Lett.
Doc-Delivery-Number	450ZY