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VOLUME 29 (1979) | ISSUE 7 | PAGE 396
The role of oxygen in the formation of the IMb3Ge film structure with high critical temperatures
We show that in order to form superconducting Nb3Ge films with record high Tc, oxygen, which stabilizes the A-15 lattice at the film boundary and facilitates the occurence of seeds of the high-temperature phase, must be present. Total superconductivity was attained at 22.2 °K, the critical temperature at Tc = 22.5 °K and the onset of superconducting transition at 23.2 °K.