Magnetoresistance of granular high-temperature superconductor YBa₂Cu₃O₇-delta in weak magnetic fields
The transverse and longitudinal magnetoresistance ∆ρ/ρ₂₇₃ K(H) of ceramic samples of the high-temperature superconductor YBa₂Cu₃O₇-δ was studied experimentally at T = 77.3 K in the magnetic fields 0 < H < 500 Oe. A phenomenon was found of a jumping variation of the magnetoresistance in the mag...
Збережено в:
| Дата: | 2004 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
НТК «Інститут монокристалів» НАН України
2004
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| Назва видання: | Functional Materials |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/139542 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Magnetoresistance of granular high-temperature superconductor YBa2Cu3O7-delta in weak magnetic fields / V.V. Derevyanko, T.V. Sukhareva, V.A. Finkel // Functional Materials. — 2004. — Т. 11, № 4. — С. 710-720. — Бібліогр.: 42 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The transverse and longitudinal magnetoresistance ∆ρ/ρ₂₇₃ K(H) of ceramic samples of the high-temperature superconductor YBa₂Cu₃O₇-δ was studied experimentally at T = 77.3 K in the magnetic fields 0 < H < 500 Oe. A phenomenon was found of a jumping variation of the magnetoresistance in the magnetic fields H = Hjump that was associated with alteration of the vortex structure. The magnetoresistance field dependence is shown to be of hysteresial nature. The presence of an alignment dependence was found of the value of the magnetoresistance and critical fields of the weak links and superconducting granules (Hc2j, HclA and Hjump), as well as the dependence of the value of the critical fields Hc2j, Hc1A and Hjump, vs. the transport current density and preceding magnetic history. |
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