Fundamental investigations of the lattice transition and superconductivity in Nb3Sn by SANS
Nb3Sn is the superconductor most used for generating the highest magnetic fields, due to its large critical current and Hc2 value, and the ability to create wires in suitable quantities. However, there are still uncertainties about its fundamental properties. Many samples show a lattice instability above Tc, converting the cubic crystal structure into tetragonal. In this respect it foreshadows the very recent observation of charge density wave order appearing above Tc in moderately underdoped YBCO [0]. In both cases, it would be expected that superconductivity and lattice distortion compete, but in Nb3Sn this competition has not been deeply investigated. We wish to study the fundamental superconducting properties of Nb3Sn in a set of well characterized low-pinning samples, by SANS measurements of the flux lattice up to 17 T using our dedicated magnet (which uses Nb3Sn in its windings!)
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BLACKBURN Elizabeth; CAMERON Alistair; DEWHURST Charles; FORGAN Edward M.; Alexander T Holmes; LARBALESTIER David; LEMBERGER Louis and SHEN Lingjia. (2013). Fundamental investigations of the lattice transition and superconductivity in Nb3Sn by SANS. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-789
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