Effect of the Temperature, External Magnetic Field, and Transport Current on Electrical Properties, Vortex Structure Evolution Processes, and Phase Transitions in Subsystems of Superconducting Grains and “Weak Links” of Granular Two-Level High-Temperature Superconductor YBa{sub 2}Cu{sub 3}O{sub 7–δ}

Journal Article · Thu Mar 15 00:00:00 EDT 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783418030083· OSTI ID:22771384

Derevyanko, V. V.; Finkel’, V. A. ^[1]

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1. National Scientific Center, Kharkov Institute of Physics and Technology (Ukraine)

The temperature dependences of the resistivity of granular high-temperature superconductor YBa{sub 2}Cu{sub 3}O{sub 7–δ} ρ(T) are measured at various transverse external magnetic fields 0 ≤ H{sub ext} ≤ 100 Oe in the temperature range from the resistivity onset temperature T{sub ρ=0} to the superconducting transition critical temperature T{sub c} at the transport current density from 50 to 2000 mA/cm{sup 2}. The effect of the external magnetic field and transport current density on the kinetics of phase transitions in both subsystems of granular two-level HTSC (T = T{sub c2J}, T{sub c1g}, T{sub c}) is determined. The feasibility of the topological phase transition, i.e., the Berezinsky–Kosterlitz–Thouless transition, in the Josephson medium at T{sub c2J} < T{sub BKT} < T{sub c1g} “in transport current” is established, and its feasibility conditions are studied.

• OSTI ID: 22771384
• Journal Information: Physics of the Solid State, Vol. 60, Issue 3; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
COPPER COMPOUNDS
CRITICAL TEMPERATURE
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GRANULAR MATERIALS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS