A strategy has been envisaged leading to extremely high current-limitation capability of melt-textured, single-domain YBa2Cu3O7−x. Underdoped, single-domain, Bridgman-grown bars having an enhanced normal state resistivity allowed to generate extremely high electric fields during a current pulse (E≈4850 V/m), and maximum total energy density dissipated during a quench transition (e≈4×109 J/m3). We suggest that the enhanced performance for current limitation applications results from the combination of a strongly anisotropic electrical resistivity in the normal state due to the opening of a pseudogap and to the creation of impurity local density of states distributed at a nanometric scale in the superconducting chains, which then generate a dense array of hot spots.
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Mendoza et al. (2003) studied this question.
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