Abstract
The superconducting transition temperature and the low temperature resistivity of highpurity NbH x samples were measured up tox=1.08. In the hydride phases (x>0.7) no transition was found above 1.3 K, whereas samples in the two-phase region 0<x<0.7 are superconducting withT c=9.4 K. The residual resistivity in the normal state exhibits a maximum of 1.2 µΩ cm atx~0.69. Magnetization curves belowT c exhibit large hysteresis effects. The morphology of the two-phase structure was analyzed by optical microscopy.
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Welter, J.M., Johnen, F.J. Superconducting transition temperature and low temperature resistivity in the niobium-hydrogen system. Z Physik B 27, 227–232 (1977). https://doi.org/10.1007/BF01325532
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DOI: https://doi.org/10.1007/BF01325532