Electron spin resonance of Gd/sub x/La/sub 1//sub - x/Pd/sub 3/ intermetallic compounds

Journal Article · Tue Mar 01 04:00:00 EST 1977 · Phys. Rev., B; (United States)

DOI:https://doi.org/10.1103/PhysRevB.15.2538· OSTI ID:7317821

Kim, J W; Karra, J S

Electron spin resonance of Gd in Gd/sub x/La/sub 1//sub - x/Pd/sub 3/ intermetallic compounds annealed at 740 and 840 degreeC exhibit a dependence of linewidths and g shifts on the annealing temperature. The linewidths and g shifts were measured as functions of temperature and concentration of Gd. Samples with high Gd concentration (1 at.% or more) were found to have bottleneck effects. All samples annealed at 740 degreeC were found to exhibit Korringa-like thermal broadening between 20 and 40 degreeK and those annealed at 840 degreeC were found to be Korringa-like between 6 and 35 degreeK. Below 20 degreeK, samples annealed at 740 degreeC were found to exhibit ordering effects whereas samples annealed at 840 degreeC did not show such effects even at 6 degreeK. These differences are indicative of the difference in the structural composition of the lattice due to annealing. We have deduced the average values for the exchange integral J to be 0.16 +- 0.03 eV and 0.15 +- 0.03 eV for the samples annealed at 740 and 840 degreeC, respectively. We have obtained also the magnitudes of two contributions to the conduction-electron relaxation rates to the lattice (i) due to undisturbed host lattice and (ii) by spin-flip scattering due to Gd.

• Research Organization: Department of Physics, Temple University, Philadelphia, Pennsylvania 19122
• OSTI ID: 7317821
• Journal Information: Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 15:5; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANNEALING
CRYSTAL STRUCTURE
ELECTRON SPIN RESONANCE
ELEMENTS
GADOLINIUM
GADOLINIUM ALLOYS
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
LANDE FACTOR
LANTHANUM ALLOYS
LINE WIDTHS
MAGNETIC RESONANCE
METALS
PALLADIUM ALLOYS
PLATINUM METAL ALLOYS
QUANTITY RATIO
RARE EARTH ALLOYS
RARE EARTHS
RESONANCE
TEMPERATURE DEPENDENCE