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This article is cited in 4 scientific papers (total in 4 papers)
XXIII International Symposium ''Nanophysics and Nanoelectronics'', Nizhny Novgorod, March 11--14, 2019
Superconductivity
Phase diagrams of thin disordered films based on HTSC YBa$_{2}$Cu$_{3}$O$_{7-x}$ in external magnetic fields
A. V. Antonova, A. V. Ikonnikovb, D. V. Masterova, A. N. Mikhaylovc, S. V. Morozova, Yu. N. Nozdrina, S. A. Pavlova, A. E. Parafina, D. I. Tetelbaumc, S. S. Ustavshchikovac, P. A. Yuninac, D. A. Savinovac a Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod
b Lomonosov Moscow State University
c Lobachevsky State University of Nizhny Novgorod
Abstract:
An unusual decrease in the slope of the upper critical field near $T_{c0}$ at a gradual increase in the ion implantation dose has been experimentally observed in narrow bridges formed on the base of thin HTSC YBa$_{2}$Cu$_{3}$O$_{7-x}$ films, while an increase in the defect concentration usually leads to an increase in the local slope of the phase transition line $H_{c 2}(T)$. In addition, it has been found that the temperature dependence of the upper critical field has a positive curvature near $T_{c0}$. A possible theoretical interpretation of the results is proposed. It is based on the modified Ginzburg–Landau theory with a nonuniform length of superconducting correlations.
Keywords:
thin HTSC films, resistive measurements in magnetic field, ion implantation, the Ginzburg–Landau theory with a nonuniform coherence length.
Received: 15.04.2019 Revised: 22.04.2019 Accepted: 24.04.2019
Citation:
A. V. Antonov, A. V. Ikonnikov, D. V. Masterov, A. N. Mikhaylov, S. V. Morozov, Yu. N. Nozdrin, S. A. Pavlov, A. E. Parafin, D. I. Tetelbaum, S. S. Ustavshchikov, P. A. Yunin, D. A. Savinov, “Phase diagrams of thin disordered films based on HTSC YBa$_{2}$Cu$_{3}$O$_{7-x}$ in external magnetic fields”, Fizika Tverdogo Tela, 61:9 (2019), 1573–1578; Phys. Solid State, 61:9 (2019), 1523–1528
Linking options:
https://www.mathnet.ru/eng/ftt8689 https://www.mathnet.ru/eng/ftt/v61/i9/p1573
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