Relaxation and exchange in a nuclear cooling agent: NMR and EPR in single crystal PrNi5

R. Levin*, A. Grayevsky, D. Shaltiel, V. Zevin, D. Davidov, D. L. Williams, N. Kaplan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

NMR of Pr and ESR of Gd in single crystals of PrNi5 are observed to exhibit a dramatic increase of the resonance linewidth with temperature in the range 1.2K ≤ T ≤ 10K. The observations are interpreted, within the framework of a crystal field spin Hamiltonian model calculation, in terms of low frequency fluctuations of the Pr ions induced by Pr-Pr exchange coupling. A fitting procedure of the theory to the experimental data enabled us to extract the various Pr-Pr and Pr-Gd exchange parameters. The former yield independent information concerning the lowest temperature that can be achieved in nuclear cooling experiments.

Original languageEnglish
Pages (from-to)855-858
Number of pages4
JournalSolid State Communications
Volume32
Issue number10
DOIs
StatePublished - Dec 1979

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