Spin-polarized electron tunneling study of an artificially layered superconductor with internal magnetic field: EuO-Al

Journal Article · Sun Apr 20 23:00:00 EST 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.56.1746· OSTI ID:5774555

Tedrow, P M; Tkaczyk, J E; Kumar, A

The tunneling conductance of junctions formed on thin films of Al in contact with films of the ferromagnetic semiconductor EuO implies that such composites behave like BCS superconductors with internal magnetization. In a magnetic field B applied in the plane of the films, the superconducting quasiparticle density of states shows a splitting 2..mu..(B(+B), where B( can be greater than B by more than a tesla. The critical field of composite films is reduced by approximately B( compared to that of identical Al films without EuO. The observed B( is of the same magnitude as ..mu../sub 0/M,the magnetization of EuO.

• Research Organization: Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5774555
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 56:16; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
360603 -- Materials-- Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
CHALCOGENIDES
ELEMENTS
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
LAYERS
METALS
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SPIN ORIENTATION
SUPERCONDUCTORS
TUNNEL EFFECT