Time evolution of Meissner effect in EuBa sub 2 Cu sub 3 O sub 7 minus. delta
Journal Article
·
· Modern Physics Letters B; (USA)
- Institute of Metal Physics, USSR Acad. Sci., Ural Branch, GSP-170, Kovalevskaya Str., 18, Sverdlovsk 620219 (SU)
The results of temperature and time (at T = 4.2 K) dependent magnetization (M) measurements on polycrystalline high T{sub c} superconductor EuBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} are reported for different magnetic fields from 2.2 kOe to 35 kOe. The measurements were performed in the field-cooled regime (measuring the Meissner effect). A new phenomenon is found: the magnetization sign inversion from negative to positive during the time at which the external conditions (T,H) remains unchanged. The differential susceptibility in a new mixed state with M {gt} O is diamagnetic. It is shown that origin of this state is not connected with a flux trapping, but rather caused by the unusual nature of the vortex themselves in FC mixed state of high T{sub c} superconductors.
- OSTI ID:
- 6427178
- Journal Information:
- Modern Physics Letters B; (USA), Journal Name: Modern Physics Letters B; (USA) Vol. 4:2; ISSN MPLBE; ISSN 0217-9849
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHEMICAL COMPOSITION
CRYSTALS
DIAMAGNETISM
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EUROPIUM COMPOUNDS
HIGH-TC SUPERCONDUCTORS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MEISSNER-OCHSENFELD EFFECT
PHASE STUDIES
PHYSICAL PROPERTIES
POLYCRYSTALS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHEMICAL COMPOSITION
CRYSTALS
DIAMAGNETISM
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EUROPIUM COMPOUNDS
HIGH-TC SUPERCONDUCTORS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MEISSNER-OCHSENFELD EFFECT
PHASE STUDIES
PHYSICAL PROPERTIES
POLYCRYSTALS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE