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Title: Systematic Studies of the Square-Hexagonal Flux Line Lattice Transition in Lu(Ni{sub 1{minus}x}Co{sub x}) {sub 2}B{sub 2}C : The Role of Nonlocality

We have studied, using small angle neutron scattering, the flux line lattice square to hexagonal symmetry transition in single crystal Lu(Ni{sub 1{minus}x}Co{sub x }){sub 2}B{sub 2}C . Low Co concentrations (x{lt}0.1) , which reduce the mean free path and increase the coherence length, also move the structural transition to higher fields than in the undoped system. These data, quantitatively understood within the framework of a theory that includes nonlocal corrections to the London model due to the Fermi surface anisotropy, can be modeled using a simple ratio of the nonlocality range to the intervortex spacing. {copyright} {ital 1999} {ital The American Physical Society}
Authors:
;  [1] ; ; ;  [2] ; ; ; ;  [3]
  1. Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974 (United States) [Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974 (United States)
  2. Riso/ National Laboratory, DK-4000 Roskilde (Denmark) [Riso/ National Laboratory, DK-4000 Roskilde (Denmark)
  3. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States) [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
Publication Date:
OSTI Identifier:
342620
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 82; Journal Issue: 20; Other Information: PBD: May 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LUTETIUM BORIDES; CARBIDES; NICKEL CARBIDES; COBALT COMPOUNDS; SUPERCONDUCTORS; MAGNETIC FLUX; NEUTRON DIFFRACTION; SMALL ANGLE SCATTERING; MONOCRYSTALS; VORTICES; PHASE TRANSFORMATIONS; COHERENCE LENGTH