A crossover in the temperature behavior of the perpendicular upper critical magnetic field of layered superconductors and thin films
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
A crossover in the temperature behavior of the perpendicular upper critical magnetic field of layered superconductors and thin films
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| Creator |
Gvozdikov, V.M.
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| Subject |
Свеpхпpоводимость, в том числе высокотемпеpатуpная
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| Description |
A mechanism which relates the upturn of the perpendicular upper critical magnetic field H┴с₂ (T) in layered superconductors and thin films with the structural inhomogeneity in the bulk of the sample, provided that the local critical temperature Tc* inside the inhomogeneity is higher than in the rest of the sample (Tc) is proposed. Within the Ginzburg-Landau approach an equation whic h describes two types of experimentally observed nonlinearities in H┴с₂ (T) near Tc for ISN (insulator-superconductor-normal metal) and NSN layer configurations, is found. In the NSN case a crossover from the linear branch H┴с₂ (T) ⋉ (Tc-T), for fields H ≤ Hₘ, to the nonlinear branch with the upturn, if H > Hₘ, takes place. The crossover field Hₘ is inversely proportional to the local enhancement of the critical temperature (Tc*-Tc) and the distance R to the surface (the nearest surface, in case of a thin film). In the ISN case the upturn holds for H
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| Date |
2018-06-20T05:31:18Z
2018-06-20T05:31:18Z 1999 |
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| Type |
Article
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| Identifier |
A crossover in the temperature behavior of the perpendicular upper critical magnetic field of layered superconductors and thin films / V.M. Gvozdikov // Физика низких температур. — 1999. — Т. 25, № 12. — С. 1251-1258. — Бібліогр.: 24 назв. — англ.
0132-6414 http://dspace.nbuv.gov.ua/handle/123456789/139336 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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