Abstract
The effect of hydrogen absorption on the electronic transport properties and superconducting temperature T c of PdZr metallic glasses fabricated by a melt quenching technique using a single roll was investigated. The temperature coefficients of the electrical resistivities of the metallic glasses were negative over the temperature range 3–300 K both before and after hydrogen absorption. The superconducting transition temperatures of Pd 1− x Zr x glasses ( x = 0.65 − 0.745) show a maximum ( T c = 2.56 K) at x = 0.7. The superconducting transitions of Pd 0.35Zr 0.65H(D) y were studied in the hydrogen (deuterium) concentration range 0 ⩽ y ⩽ 1 and T c was found to decrease linearly with hydrogen concentration with an initial rate d T c /dy of 3.6 K. A very weak isotope effect on T c was observed with respect to hydrogen and deuterium substitution. The changes in the electronic states and the phonon mode due to hydrogen absorption are discussed.
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