TY - JOUR
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 - http://www.scopus.com/inward/record.url?scp=0018705027&partnerID=8YFLogxK
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 -