Disorder and the upper critical field of Nb/sub 3/Ge

Conference · Tue Sep 01 04:00:00 EDT 1981 · IEEE Trans. Magn.; (United States)

OSTI ID:6336362

Habermeier, H U

The upper critical field, H/sub c2/, as determined from experimental values of T/sub c/ and (dH/sub c2//dT)/sub Tc/, has been investigated in Nb/sub 3/Ge superconducting thin films with different degree of structural disorder. An increase of H/sub c2/(O) up to 36.9 T was found for samples with resistivities ranging from 40 to 60 /mu/sub/ OMEGA/cm and a decrease of H/sub c2/(O) to 5.7 T for /rho/.150 /mu/sub/ OMEGA/cm. Based on the Ginsburg-Landau solution for H/sub c2/(O) and the change of the coherence length with the electron mean free path a model is presented which describes the change of H/sub c2/(O) with resistivity, qualitatively. 15 refs.

• Research Organization: IBM, Yorktown Heights, NY, USA
• OSTI ID: 6336362
• Report Number(s): CONF-810340-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG-17:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
GERMANIUM ALLOYS
MAGNETIC FIELDS
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHYSICAL PROPERTIES
SPECTRA
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION TEMPERATURE
X-RAY SPECTRA