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

doi:10.1016/0038-1098(79)90485-X

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

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	855-858
Number of pages	4
Journal	Solid State Communications
Volume	32
Issue number	10
DOIs	https://doi.org/10.1016/0038-1098(79)90485-X
State	Published - Dec 1979

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title = "Relaxation and exchange in a nuclear cooling agent: NMR and EPR in single crystal PrNi5",

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.",

author = "R. Levin and A. Grayevsky and D. Shaltiel and V. Zevin and D. Davidov and Williams, \{D. L.\} and N. Kaplan",

year = "1979",

month = dec,

doi = "10.1016/0038-1098(79)90485-X",

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T1 - Relaxation and exchange in a nuclear cooling agent

T2 - NMR and EPR in single crystal PrNi5

AU - Levin, R.

AU - Grayevsky, A.

AU - Shaltiel, D.

AU - Zevin, V.

AU - Davidov, D.

AU - Williams, D. L.

AU - Kaplan, N.

PY - 1979/12

Y1 - 1979/12

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0018705027

U2 - 10.1016/0038-1098(79)90485-X

DO - 10.1016/0038-1098(79)90485-X

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AN - SCOPUS:0018705027

SN - 0038-1098

VL - 32

SP - 855

EP - 858

JO - Solid State Communications

JF - Solid State Communications

IS - 10

ER -

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

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