Transport properties of superconducting and non superconducting sputtered thin films of Nb-N

Author

Baixeras, J. ; Andro, P. ; Cazabat, M.

Author_Institution

IEEE TMAG

Volume

11

Issue

5

fYear

1975

fDate

9/1/1975 12:00:00 AM

Firstpage

1464

Lastpage

1466

Abstract

We have prepared and studied various kinds of sputered Nb-N samples. By changing the preparation conditions we can indeed obtain superconducting samples or on the opposite very resistive samples. In the first case we have studied the behaviour of the slope of the critical field versus temperature curves near Tcand we have shown that $(frac{dH_{c2}}{dT})_{T_{c}}$ is a regular increasing function of the Ginzburg-Landau parameter κ. On the other hand have measured the perature dependent resistivity $\\rho(T)$ , of the nonsuperconducting samples. The results can be interpreted in terms of hopping conduction in disordered materials, the resistivity indeed fit well Mott\´s relation, $\\rho=\\rho_{0}\\exp(frac{T}{T_{o}})^{-1/4}$ .

Keywords

Magnetic thermal factors; Niobium materials/devices; Sputtering; Superconducting materials; Conducting materials; Conductivity; High temperature superconductors; Magnetic field measurement; Nitrogen; Plasma temperature; Sputtering; Superconducting magnets; Superconducting materials; Superconducting thin films;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1975.1058859

Filename

1058859