Anisotropic magnetic relaxation, hysteresis, and Meissner fraction in untwinned single-crystal YBa sub 2 Cu sub 3 O sub 7 minus. delta. produced without applying stress

Journal Article · Sun Apr 01 00:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.6532· OSTI ID:7122672

Rice, J P; Ginsberg, D M; Rabin, M W ^[1]; Vandervoort, K G; Crabtree, G W; Claus, H ^[2]

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1. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL (USA) Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (USA)
2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (USA)

By quenching the tetragonal phase during crystal growth of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and then oxygenating the crystals without mechanical stress, we obtain some essentially untwinned crystals. Magnetic measurements on such crystals, with fields applied along the {ital a} or {ital b} axis, show anisotropy. A qualitative analysis of our relaxation and hysteresis data indicates that the critical current density is higher along {ital a} than along {ital b} (the chain direction). The anisotropic Meissner percent data show that pinning is higher for fields along {ital b} than along {ital a}.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7122672
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 41:10; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
MAGNETIC PROPERTIES
COPPER OXIDES
YTTRIUM OXIDES
ANISOTROPY
CRITICAL CURRENT
HYSTERESIS
MEISSNER-OCHSENFELD EFFECT
MONOCRYSTALS
RELAXATION TIME
STRAINS
TETRAGONAL LATTICES
TWINNING
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties