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This article is cited in 8 scientific papers (total in 8 papers)
Superconductivity
Phase transitions in a MgB$_{2}$ granular BCS superconductor in weak magnetic fields
V. V. Derevyanko, M. S. Sungurov, T. V. Sukhareva, V. A. Finkel, Yu. N. Shakhov National Science Centre Kharkov Institute of Physics and Technology
Abstract:
The character of temperature dependences of the electric conductivity of MgB$_{2}$ granular BCS superconductors at temperatures of $\sim$35–45 K in external magnetic fields H ext of up to $\sim$2 kOe is studied. An increase in the superconducting transition width $\Delta T_{c}$ with an increase in Hext is found. The presence of a system of weak links in MgB$_{2}$-based granular superconductors is established. On the basis of experimental data, MgB$_{2}$ granular superconductor is assigned to two-level superconducting systems and the $H$–$T$ phase diagram is constructed.
Received: 10.05.2016 Revised: 28.06.2016
Citation:
V. V. Derevyanko, M. S. Sungurov, T. V. Sukhareva, V. A. Finkel, Yu. N. Shakhov, “Phase transitions in a MgB$_{2}$ granular BCS superconductor in weak magnetic fields”, Fizika Tverdogo Tela, 59:2 (2017), 223–229; Phys. Solid State, 59:2 (2017), 229–235
Linking options:
https://www.mathnet.ru/eng/ftt9663 https://www.mathnet.ru/eng/ftt/v59/i2/p223
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