Effect of superconductivity on spin dynamics in (Y/sub 1-x/R/sub x/)Rh/sub 4/B/sub 4/
An adiabatic--field-cycle method for /sup 11/B nuclear magnetic relaxation has been used to study the spin dynamics of rare-earth ions in dilute (Y/sub 1-x/R/sub x/)Rh/sub 4/B/sub 4/. Longitudinal dipolar fluctuations of rare-earth moments are found to be the main source for the spin-lattice relaxation time of /sup 11/B. The variation of T/sub 1/ in the superconducting state is attributed to the reduction of the electronic spin-relaxation time tau/sub m/, which is mainly determined by the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction mediated by the conduction electrons. The remarkable reduction of the RKKY coupling below T/sub c/ is discussed in connection with the reduction of the conduction-electron spin susceptibility chi(q).
- Research Organization:
- Argonne National Laboratory, Argonne, Illinois 60439
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5932131
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 27:5; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
BORIDES
BORON 11 BEAMS
BORON COMPOUNDS
COUPLING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ERBIUM BORIDES
ERBIUM COMPOUNDS
GADOLINIUM BORIDES
GADOLINIUM COMPOUNDS
ION BEAMS
KINETICS
MAGNETIC RESONANCE
MAGNETISM
NUCLEAR MAGNETIC RESONANCE
NUCLEAR REACTION KINETICS
PHYSICAL PROPERTIES
POINT DEFECTS
RARE EARTH COMPOUNDS
REACTION KINETICS
RELAXATION
RESONANCE
RHODIUM BORIDES
RHODIUM COMPOUNDS
RUDERMAN-KITTEL COUPLING
SPIN-LATTICE RELAXATION
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TIME MEASUREMENT
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VACANCIES
YTTRIUM BORIDES
YTTRIUM COMPOUNDS