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Neutron diffraction by vortex lattices in superconducting niobium
Author(s) -
Lippmann G.,
Schelten J.
Publication year - 1974
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889874009459
Subject(s) - niobium , superconductivity , reciprocal lattice , neutron diffraction , condensed matter physics , diffraction , lattice constant , vortex , lattice (music) , hexagonal lattice , single crystal , hexagonal crystal system , materials science , neutron , physics , optics , crystallography , antiferromagnetism , chemistry , nuclear magnetic resonance , nuclear physics , acoustics , metallurgy , thermodynamics
Neutron diffraction experiments on vortex single crystals reveal various information on properties of flux‐line lattices. In this paper we present the data obtained from a pure single‐crystal niobium rod with its axis parallel to a 〈111〉 direction and a Ginzburg–Landau parameter of 0.9. For the largest achievable lattice parameter in this sample of 1940 Å at 4.2°K we found a hexagonal flux‐line lattice with an azimuthal mosaic spread of 60′ and a radial one of less than 1.2′. From the integrated reflectivity we determined the absolute values of the form factors at the reciprocal lattice points 10, 11, 20, 21, 30 and 31 From these form factors the local magnetic field distribution was calculated.