Anisotropic vortex lattice in YBa[sub 2]Cu[sub 3]O[sub 7]

Journal Article · Mon Nov 01 00:00:00 EST 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.3019· OSTI ID:5774418

Yethiraj, M; Mook, H A; Wignall, G D; Cubitt, R; Forgan, E M; Lee, S L; Paul, D M; Armstrong, T ^[1]

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1. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393 (United States) Superconductivity Research Group, University of Birmingham, Birmingham B15 2TT (United Kingdom) Physik-Institut der Universitaet Zuerich, Schoenberggasse 9, CH 8001, Zuerich (Switzerland) Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom) Allied Signal Research Laboratories, Torrance, California 90509 (United States)

We report on small angle neutron scattering observations of the flux line lattice (FLL) in a single crystal of YBa[sub 2]Cu[sub 3]O[sub 7]. To probe the mass anisotropy ratio, [ital m][sub 3]/[ital m][sub 1], measurements were made as a function of angle, [Theta], between the 8 kOe applied field and the crystallographic (001) axis for 0[degree][le][Theta][le]80[degree]. With the rotation about an [ital a]/[ital b] (or [ital y]) axis, two symmetry-related distorted hexagonal FLL domains formed. Contrary to theoretical prediction, the lattices formed are consistent with a rotation of the short basis vector, [bold a][sub 1], from the [ital x] axis by 15[degree], after the effects of anisotropy are removed. The mass ratio is 20[plus minus]2, which is slightly lower than published values. The temperature dependence of the intensity is not conventional.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5774418
• Journal Information: Physical Review Letters; (United States), Vol. 71:18; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
ANISOTROPY
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
EFFECTIVE MASS
LATTICE PARAMETERS
MAGNETIC FLUX
MONOCRYSTALS
NEUTRON DIFFRACTION
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTALS
DIFFRACTION
MASS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)