Effect of twin boundaries on flux pinning in YBa sub 2 Cu sub 3 O sub 7 minus x at low and intermediate magnetic fields
Journal Article
·
· Journal of Applied Physics; (United States)
- Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland (USA)
Magnetic measurements on a single crystal of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} in the twinned and detwinned states have demonstrated that flux pinning by twin boundaries is strongly dependent upon temperature and the magnitude and orientation of the applied field with respect to the crystallographic orientation. For applied magnetic fields perpendicular to the {ital c} axis, no effect of twin boundaries on flux pinning was found at any temperature. In contrast, for fields up to 400 Oe aligned parallel to the {ital c} axis, the hysteresis loops at 77 K clearly showed increased pinning due to twin boundaries. At 40 K and low fields ({ital H}{lt}500 Oe) the flux pinning was nearly the same for the twinned and detwinned states, whereas at higher fields (up to 40 kOe), pinning was higher in the twinned state. At this temperature, a tendency toward flux depinning occurred in the detwinned state at about 10 kOe, and both the twinned and detwinned states exhibited a more rigid flux structure at 50 kOe than at 10 kOe.
- OSTI ID:
- 5053248
- Journal Information:
- Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 70:10; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
·
Tue Jun 01 00:00:00 EDT 1993
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:6611406
Low-field flux pinning in twinned and detwinned single crystals of YBa sub 2 Cu sub 3 O sub 7 minus x
Journal Article
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Mon Apr 08 00:00:00 EDT 1991
· Applied Physics Letters; (USA)
·
OSTI ID:5743030
Direct evidence for an effect of twin boundaries on flux pinning in single-crystal YBa sub 2 Cu sub 3 O sub 6+ x
Journal Article
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Sun Jan 21 23:00:00 EST 1990
· Physical Review Letters; (USA)
·
OSTI ID:6964471
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUATERNARY COMPOUNDS
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TWINNING
ULTRALOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUATERNARY COMPOUNDS
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TWINNING
ULTRALOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES