INVESTIGADORES
HABERKORN Nestor Fabian
artículos
Título:
Effect of the nitrogen-argon gas mixtures on the superconductivity properties of reactively sputtered molybdenum nitride thin films
Autor/es:
N. HABERKORN; S. BENGIO; S. SUAREZ; P. PEREZ; M. SIRENA; J. GUIMPEL
Revista:
MATERIALS LETTERS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2018 vol. 215 p. 15 - 18
ISSN:
0167-577X
Resumen:
We report on the superconducting properties of nanocrystalline molybdenum nitride thin films grown by reactive DC sputtering at room temperature with a N2:Ar mixture. Thin films grown using 5 % N2 concentration display Tc = 8 K, which is gradually reduced to 5.8 K for 30 % N2 concentration, producing changes in nitrogen stoichiometry of the samples from Mo2N to Mo2N(1+x) (0 < x < 0.4). The Tc is abruptly reduced and disappears for N2 concentration between 30 % and 40 %, which can be attributed to an increment in the disorder due to phase coexistence between cubic gamma-Mo2N and non-superconducting amorphous MoN (dominant for N2 concentration > 40 %).
