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Author Yethiraj, M. ♦ Paul, D. M. ♦ Tomy, C. V. ♦ Thompson, J. R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ YTTRIUM COMPOUNDS ♦ NICKEL COMPOUNDS ♦ MAGNETIC FLUX ♦ YTTRIUM CARBIDES ♦ NICKEL CARBIDES ♦ NICKEL BORIDES ♦ YTTERBIUM BORIDES ♦ PENETRATION DEPTH
Abstract Magnetic fields penetrate a type-II superconductor via quantized flux lines. Why these flux lines sometimes form square arrays, as in YNi{sub 2}B{sub 2}C with the field parallel to the {ital c} axis, rather than the expected hexagonal ordering, has long fascinated physicists and has eluded a simple explanation. Our latest measurements on YNi{sub 2}B{sub 2}C prove conclusively that the London penetration depth within the {ital a-b} plane is not isotropic. This anisotropy of the London depths implies that the cross section of an individual flux line has square symmetry, which makes a square lattice energetically favored over the more prosaic hexagonal ordering. {copyright} {ital 1998} {ital The American Physical Society}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1998-12-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 58
Issue Number 22


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