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25 April 2024

» arxiv » cond-mat/0104052

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Temperature Dependence of the Flux Line Lattice Transition into Square Symmetry in Superconducting LuNi$_2$B$_2$C
M. R. Eskildsen ; A. B. Abrahamsen ; V. G. Kogan ; P. L. Gammel ; K. Mortensen ; N. H. Andersen ; P. C. Canfield ;
Date:	3 Apr 2001
Subject:	Superconductivity \| cond-mat.supr-con
Abstract:	We have investigated the temperature dependence of the H \|\| c flux line lattice structural phase transition from square to hexagonal symmetry, in the tetragonal superconductor LuNi_2B_2C (T_c = 16.6 K). At temperatures below 10 K the transition onset field, H_2(T), is only weakly temperature dependent. Above 10 K, H_2(T) rises sharply, bending away from the upper critical field. This contradicts theoretical predictions of H_2(T) merging with the upper critical field, and suggests that just below the H_c2(T)-curve the flux line lattice might be hexagonal.
Source:	arXiv, cond-mat/0104052
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