Systematic study of the superconducting and normal-state properties of neutron-irradiated MgB2
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2006-04-01
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American Physical Society
Abstract
We have performed a systematic study of the evolution of the superconducting and normal state properties of neutron-irradiated MgB2 wire segments as a function of fluence and post exposure annealing temperature and time. All fluences used suppressed the transition temperature, T-c, below 5 K and expanded the unit cell. For each annealing temperature T-c recovers with annealing time and the upper critical field, H-c2(T=0), approximately scales with T-c. By judicious choice of fluence, annealing temperature, and time, the T-c of damaged MgB2 can be tuned to virtually any value between 5 and 39 K. For higher annealing temperatures and longer annealing times, the recovery of T-c tends to coincide with a decrease in the normal state resistivity and a systematic recovery of the lattice parameters.
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This article is published as Wilke, R. H. T., S. L. Bud’ko, P. C. Canfield, J. Farmer, and S. T. Hannahs. "Systematic study of the superconducting and normal-state properties of neutron-irradiated MgB 2." Physical Review B 73, no. 13 (2006): 134512.
DOI: 10.1103/PhysRevB.73.134512.
Copyright 2006 American Physical Society.
Posted with permission.