Article ID Journal Published Year Pages File Type
1814148 Physica B: Condensed Matter 2007 5 Pages PDF
Abstract

We have investigated flux lines in low- and high-TcTc superconductors using unpolarized and polarized neutron techniques. In high-TcTc materials, we observe transitions from triangular to square flux line lattices (FLLs) which probably represent the effects of d-wave pairing. In niobium, a supposedly ‘conventional’ superconductor, even more FLL phase transitions can be observed, into structures which spontaneously break the crystal symmetry. Observations of polarized neutron scattering intensities from niobium with a high density of pinning centers show the effects of pinning on the spin-dependence of the signal. Other possible applications of polarized neutrons scattering from the FLL are mentioned.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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