Superconductivity in FCC MoxNb1-x(NyC1-y)zthin films

Author

Wolf, S.A. ; Qadri, S.B. ; Kihlstrom, K.E. ; Simon, R.M. ; Fuller, W.W. ; VanVechten, D. ; Skelton, E.F. ; Gubser, D.U.

Author_Institution

Naval Research Laboratory, Washington, D.C.

Volume

21

Issue

2

fYear

1985

fDate

3/1/1985 12:00:00 AM

Firstpage

839

Lastpage

841

Abstract

In an attempt to prepare the predicted high superconducting transition temperature material MoN, films of MoxNB1-x(NyC1-y)zwhere 0.93>x>0, 1.0>y>0.8, and 1.0>z>0.5, have been prepared in a UHV system by reactive rf sputtering of a split Mo-Nb target in mixtures of argon, nitrogen and cyanogen gases. These films prepared at elevated temperatures (600- 800 C) are all single phase FCC (Bl) structure with varying amounts of nitrogen deficiencies. The lattice parameter and Tc are smoothly varying functions of composition with a maximum Tcof 18 K for NbN0.8C0.2Tcinitially decreases with increasing Mo content reaches a minimum and begins to increase on the very Mo rich composition side where the nitrogen deficiencies in the structure are significant. Nitrogen implantation increases the lattice properties of the Nb rich samples.

Keywords

Superconducting materials; Argon; FCC; Lattices; Niobium; Nitrogen; Sputtering; Superconducting films; Superconducting materials; Superconducting transition temperature; Superconductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1985.1063660

Filename

1063660