{sup 11}B NMR in YbNi{sub 2}B{sub 2}C single crystals: Crossover from localized moments to Fermi-liquid behavior
- Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames , Iowa 50011 (United States)
Data of {sup 11}B NMR in a single crystal of YbNi{sub 2}B{sub 2}C are reported in the temperature range 1.7{endash}300 K and for two orientations of the external magnetic field with respect to the tetragonal c axis of the crystal. For T{gt}50K both the Knight shift K and the nuclear spin-lattice relaxation rate T{sub 1}{sup {minus}1} can be accounted for by the presence of localized 4f moments at the Yb{sup 3+} site which polarize the conduction electrons via the Ruderman-Kittel-Kasuya-Yosida mechanism. On the other hand, at low temperatures, T{lt}5K, the relaxation rate T{sub 1}{sup {minus}1} obeys a Korringa-like law with a constant value of T{sub 1}T typical of a normal metal with high density of states at the Fermi level and no localized moments. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Ames National Laboratory
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 542247
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 10; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
66 PHYSICS
YTTERBIUM CARBIDES
SPIN-LATTICE RELAXATION
SUPERCONDUCTIVITY
NICKEL CARBIDES
BORON CARBIDES
NICKEL COMPOUNDS
NUCLEAR MAGNETIC RESONANCE
KNIGHT SHIFT
YTTERBIUM COMPOUNDS
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
NMR SPECTRA
FERMI LEVEL
TRANSITION TEMPERATURE
MAGNETIC MOMENTS