Annealing of heavy ion irradiated Nb/sub 3/Ge films

Conference · Fri Mar 01 04:00:00 EST 1985 · IEEE Trans. Magn.; (United States)

OSTI ID:6340967

Kramer, H P; Adrian, H; Nolscher, C; Saemann-Ischenko, G; Schauer, W; Wuhl, H

High T /SUB c/ Nb/sub 3/Ge films prepared by coevaporation have been irradiated by 20 MeV sulfur ions at low temperatures (< 25 K). X-ray analysis showed an expansion of the A15 lattice and an increasing degree of amorphicity, while T /SUB c/ vs. dose decreased from 22 K to 4.3 K with a slight minimum of about 70 mK depth at /PHI/t about 3 . 10/sup 15/ cm/sup -2/ before saturation. - Films irradiated by doses up to less than or equal to 1.5 . 10/sup 15/ cm/sup -2/ could be annealed to the pre-irradiation T /SUB c/ . In contrast, strong irradiation led to an (X-ray-) amorphous structure, from which T /SUB c/ values of only 15-17 K could be recovered, similar to the results obtained for amorphous NbGe films condensed at LN/sub 2/ temperature. - The behaviour of the film resistivity during the heat treatment indicates that for films irradiated by low doses only lattice defects anneal, whereas for high dose damaged films recrystallization from the amorphous state occurs.

• Research Organization: Kernforschungszentrum Karlsruhe, Institut fur Technische Physik, and Universitat Karlsruhe, Karlsruhe
• OSTI ID: 6340967
• Report Number(s): CONF-840937-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG-21:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals &amp; Alloys-- Preparation &amp; Fabrication
420201* -- Engineering-- Cryogenic Equipment &amp; Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
ANNEALING
CHARGED PARTICLES
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
EVAPORATION
FABRICATION
FILMS
GERMANIUM ALLOYS
HEAT TREATMENTS
ION IMPLANTATION
IONS
NIOBIUM ALLOYS
PHASE TRANSFORMATIONS
SULFUR IONS
SUPERCONDUCTORS