Ho-ion dynamics in Ho/sub x/Lu/sub 1-x/Rh/sub 4/B/sub 4/
New ..mu..SR measurements of Ho-ion dynamics in Ho/sub x/Lu/sub 1-x/Rh/sub 4/B/sub 4/ are reported for x = 0.02 and 0.005. These compounds are superconducting below T/sub c/approx. =11 K. The measured concentration dependence of the Ho/sup 3 +/ spin-lattice relaxation rate GAMMA/sub 0/ is consistent with single-ion, conduction electron scattering (the Korringa mechanism) as the dominant process. Above about 10 K, GAMMA/sub 0/ is activated with an energy of 66 K, about 1/2 of the overall crystal-field splitting. Below about 10 K (in the superconducting state) a more gradual temperature dependence is observed, as reported previously for x = 0.70 and x = 0.02. This temperature dependence is not consistent with the usual exponential decay in the superconducting state. Using a model of conduction-electron-exchange scattering which includes the full crystal-field potentials, we show that a reasonably quantitative understanding of the overall temperature dependence can be achieved.
- Research Organization:
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5864923
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 57:8
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of superconductivity on rare-earth-ion dynamics in (Ho/sub x/Lu/sub 1-x/)Rh/sub 4/B/sub 4/
mu. SR measurement of rare-earth moment dynamics in the Ho/sub x/Lu/sub 1-x/Rh/sub 4/B/sub 4/ ternary alloy system
Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON COMPOUNDS
MUON PROBES
SPIN-LATTICE RELAXATION
SUPERCONDUCTIVITY
HOLMIUM COMPOUNDS
LUTETIUM COMPOUNDS
RHODIUM COMPOUNDS
BEAM DYNAMICS
CRYSTAL FIELD
ELECTRON COLLISIONS
INELASTIC SCATTERING
ION BEAMS
TEMPERATURE DEPENDENCE
BEAMS
COLLISIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
PHYSICAL PROPERTIES
PROBES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RELAXATION
SCATTERING
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)