Email this article Phase transitions in a MgB2 granular BCS superconductor in weak magnetic fields
- Authors: Derevyanko V.V.1, Sungurov M.S.1, Sukhareva T.V.1, Finkel’ V.A.1, Shakhov Y.N.1
-
Affiliations:
- National Science Center Kharkov Institute of Physics and Technology
- Issue: Vol 59, No 2 (2017)
- Pages: 229-235
- Section: Superconductivity
- URL: https://bakhtiniada.ru/1063-7834/article/view/199603
- DOI: https://doi.org/10.1134/S1063783417020056
- ID: 199603
Cite item
Open Access
Access granted
Subscription Access
Abstract
The character of temperature dependences of the electric conductivity of MgB2 granular BCS superconductors at temperatures of ~35–45 K in external magnetic fields Hext of up to ~2 kOe is studied. An increase in the superconducting transition width ΔTc with an increase in Hext is found. The presence of a system of weak links in MgB2-based granular superconductors is established. On the basis of experimental data, MgB2 granular superconductor is assigned to two-level superconducting systems and the H–T phase diagram is constructed.
About the authors
V. V. Derevyanko
National Science Center Kharkov Institute of Physics and Technology
Email: sukhareva_2003@mail.ru
Ukraine, Kharkov, 61108
M. S. Sungurov
National Science Center Kharkov Institute of Physics and Technology
Email: sukhareva_2003@mail.ru
Ukraine, Kharkov, 61108
T. V. Sukhareva
National Science Center Kharkov Institute of Physics and Technology
Author for correspondence.
Email: sukhareva_2003@mail.ru
Ukraine, Kharkov, 61108
V. A. Finkel’
National Science Center Kharkov Institute of Physics and Technology
Email: sukhareva_2003@mail.ru
Ukraine, Kharkov, 61108
Yu. N. Shakhov
National Science Center Kharkov Institute of Physics and Technology
Email: sukhareva_2003@mail.ru
Ukraine, Kharkov, 61108
Supplementary files
