Nuclear relaxation and impurity magnetism in superconducting La/sub 1 - c/Gd/sub c/Al/sub 2/ and La/sub 1 - c/Ce/sub c/Al/sub 2/

Journal Article · Sat Jan 01 04:00:00 EST 1977 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00654563· OSTI ID:7260526

MacLaughlin, D E

The /sup 139/La spin-lattice relaxation rate in the normal and superconducting states of La/sub 1//sub - c/Gd/sub c/Al/sub 2/ and La/sub 1//sub - c/Ce/sub c/Al/sub 2/ alloys has been studied as a probe of the effect of magnetic impurities on superconducting quasiparticle excitations in these systems. Comparison of the experimental data with the theory of pair breaking by magnetic impurities verifies the predicted broadening of the peak in the spectrum of quasiparticle excitations. The dependence of the relaxation rate on the strength of the coupling between conduction electrons and impurities is not fully resolved in the present experiments.

• Research Organization: Laboratoire de Physique des Solides, Universite Paris-Sud, Orsay, France
• OSTI ID: 7260526
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 26:1; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CERIUM ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXCITONS
GADOLINIUM ALLOYS
IMPURITIES
INTERMEDIATE MASS NUCLEI
ISOTOPES
LANTHANUM 139
LANTHANUM ALLOYS
LANTHANUM ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
PHYSICAL PROPERTIES
QUASI PARTICLES
RARE EARTH ALLOYS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RELAXATION
SPIN-LATTICE RELAXATION
STABLE ISOTOPES
SUPERCONDUCTIVITY