Phase Transitions and Vortex Structure Evolution in Two-Level High- Temperature Granular Superconductor Y[Ba.sub.2][Cu.sub.3][O.sub.7-[delta]] under Temperature and Magnetic Field
Temperature dependences of the resistivity [rho] (T) of samples of granular high-temperature superconductor Y[Ba.sub.2][Cu.sub.3][O.sub.7-[delta]] are measured at various transverse external magnetic fields at 0 < [H.sub.ext] < 1900 Oe in the temperature range from the upper Josephson critical...
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Veröffentlicht in: | Physics of the solid state 2017-08, Vol.59 (8), p.1492 |
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creator | Derevyanko, V.V Sukhareva, T.V Finkel, V.A |
description | Temperature dependences of the resistivity [rho] (T) of samples of granular high-temperature superconductor Y[Ba.sub.2][Cu.sub.3][O.sub.7-[delta]] are measured at various transverse external magnetic fields at 0 < [H.sub.ext] < 1900 Oe in the temperature range from the upper Josephson critical temperature of "weak bonds" [T.sub.c2J] to temperatures slightly exceeding the superconducting transition temperature [T.sub.c]. Based on the data obtained, the behavior of the field dependences of the critical temperatures of superconducting grains and "weak bonds," and temperature and field dependences of the magnetic contribution to the resistivity [mathematical expression not reproducible]. It is shown that the behavior of the magnetic contribution to the resistivity [DELTA][rho] along the line of the phase transition related to the onset of the magnetic field penetration in the form of Abrikosov vortices into the subsystem of superconducting grains [T.sub.c1g]([H.sub.ext]) is anomalous. The concepts on the magnetic flux redistribution between both subsystems of two-level HTSC near in the vicinity of [T.sub.c1g]: the Josephson vortex decreases, and the Abrikosov vortex density increases. |
doi_str_mv | 10.1134/S1063783417080091 |
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Based on the data obtained, the behavior of the field dependences of the critical temperatures of superconducting grains and "weak bonds," and temperature and field dependences of the magnetic contribution to the resistivity [mathematical expression not reproducible]. It is shown that the behavior of the magnetic contribution to the resistivity [DELTA][rho] along the line of the phase transition related to the onset of the magnetic field penetration in the form of Abrikosov vortices into the subsystem of superconducting grains [T.sub.c1g]([H.sub.ext]) is anomalous. 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Based on the data obtained, the behavior of the field dependences of the critical temperatures of superconducting grains and "weak bonds," and temperature and field dependences of the magnetic contribution to the resistivity [mathematical expression not reproducible]. It is shown that the behavior of the magnetic contribution to the resistivity [DELTA][rho] along the line of the phase transition related to the onset of the magnetic field penetration in the form of Abrikosov vortices into the subsystem of superconducting grains [T.sub.c1g]([H.sub.ext]) is anomalous. The concepts on the magnetic flux redistribution between both subsystems of two-level HTSC near in the vicinity of [T.sub.c1g]: the Josephson vortex decreases, and the Abrikosov vortex density increases.</description><subject>High temperature superconductors</subject><subject>Magnetic fields</subject><issn>1063-7834</issn><issn>1090-6460</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNpVUE1PwkAQbYwmIvoDvO3VQ3G3227LEQkCCQZjGxPTELLsTsua0pr9QP-Xf9AFPcjMYV5m3nuZmSC4JXhACI3vc4IZTTMakxRnGA_JWdAjeIhDFjN8fsCMhof5ZXBlzDvGhJBk2Au-n7fcACo0b42yqmsN4q1Er5228IVyq52wTgOa7LvGHeZItaj47MIF7KFBM1VvQ1TA7gM0PxKn3sk1XKPc-Z7oWukdOo3eygc-MG4ziFbl2B0RXZXLI0jDUkJj-WqFXCtBnxge1nnidQtWCfSooJHXwUXFGwM3f7UfFI-TYjwLF8vpfDxahHVK4zCJWAxYCCkzHxtJRJbJiEoQhDLOeRJHQ1ZFFU4jwNkmoVEFLAWcZkRIkBXtB4Nf25o3sFZt1VnNhU8JO-UPg0r5_iiJYpphlsRecHci8Bz_RFtzZ8x6nr_85_4AyTWG2A</recordid><startdate>20170801</startdate><enddate>20170801</enddate><creator>Derevyanko, V.V</creator><creator>Sukhareva, T.V</creator><creator>Finkel, V.A</creator><general>Springer</general><scope>ISR</scope></search><sort><creationdate>20170801</creationdate><title>Phase Transitions and Vortex Structure Evolution in Two-Level High- Temperature Granular Superconductor Y[Ba.sub.2][Cu.sub.3][O.sub.7-[delta]] under Temperature and Magnetic Field</title><author>Derevyanko, V.V ; Sukhareva, T.V ; Finkel, V.A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-g734-5264e0ccdd8888bd1c88d23dec136aaa54296f2f072e08b532fe67e0781cdedf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>High temperature superconductors</topic><topic>Magnetic fields</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Derevyanko, V.V</creatorcontrib><creatorcontrib>Sukhareva, T.V</creatorcontrib><creatorcontrib>Finkel, V.A</creatorcontrib><collection>Gale In Context: Science</collection><jtitle>Physics of the solid state</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Derevyanko, V.V</au><au>Sukhareva, T.V</au><au>Finkel, V.A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Phase Transitions and Vortex Structure Evolution in Two-Level High- Temperature Granular Superconductor Y[Ba.sub.2][Cu.sub.3][O.sub.7-[delta]] under Temperature and Magnetic Field</atitle><jtitle>Physics of the solid state</jtitle><date>2017-08-01</date><risdate>2017</risdate><volume>59</volume><issue>8</issue><spage>1492</spage><pages>1492-</pages><issn>1063-7834</issn><eissn>1090-6460</eissn><abstract>Temperature dependences of the resistivity [rho] (T) of samples of granular high-temperature superconductor Y[Ba.sub.2][Cu.sub.3][O.sub.7-[delta]] are measured at various transverse external magnetic fields at 0 < [H.sub.ext] < 1900 Oe in the temperature range from the upper Josephson critical temperature of "weak bonds" [T.sub.c2J] to temperatures slightly exceeding the superconducting transition temperature [T.sub.c]. Based on the data obtained, the behavior of the field dependences of the critical temperatures of superconducting grains and "weak bonds," and temperature and field dependences of the magnetic contribution to the resistivity [mathematical expression not reproducible]. It is shown that the behavior of the magnetic contribution to the resistivity [DELTA][rho] along the line of the phase transition related to the onset of the magnetic field penetration in the form of Abrikosov vortices into the subsystem of superconducting grains [T.sub.c1g]([H.sub.ext]) is anomalous. The concepts on the magnetic flux redistribution between both subsystems of two-level HTSC near in the vicinity of [T.sub.c1g]: the Josephson vortex decreases, and the Abrikosov vortex density increases.</abstract><pub>Springer</pub><doi>10.1134/S1063783417080091</doi><tpages>9</tpages></addata></record> |
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title | Phase Transitions and Vortex Structure Evolution in Two-Level High- Temperature Granular Superconductor Y[Ba.sub.2][Cu.sub.3][O.sub.7-[delta]] under Temperature and Magnetic Field |
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