Pt195 spin dynamics and Knight shift in single crystals of UPt3

Moohee Lee*, G. F. Moores, Y. Q. Song, W. P. Halperin, W. W. Kim, G. R. Stewart

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Pt195 nuclear-magnetic-resonance measurements were performed on aligned single-crystal whiskers of UPt3 for temperatures from 4 to 50 K. A special alignment technique allows us to produce samples with very good c-axis alignment and to work with the field parallel to the c axis with an excellent signal-to-noise ratio. Combining the Knight shift and spin-lattice-relaxation data, we show a continuous crossover from paramagnetic behavior above 40 K toward a degenerate-Fermi-liquid behavior below 5 K. Antiferromagnetic spin fluctuations appear to be responsible for this crossover process, and dominate all low-frequency magnetic properties of this compound. The anisotropy ratios of both the spin-lattice and the spin-spin relaxation rates are found to be temperature independent. Analyzing these ratios we find that the imaginary part of the dynamic spin susceptibility is slightly stronger in the basal plane.

Original languageEnglish (US)
Pages (from-to)7392-7398
Number of pages7
JournalPhysical Review B
Volume48
Issue number10
DOIs
StatePublished - 1993

ASJC Scopus subject areas

  • Condensed Matter Physics

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