| Issue |
J. Phys. Colloques
Volume 39, Number C6, Août 1978
The XVth International Conference on low temperature physicsQuantum Fluids and Solids Superconductivity |
|
|---|---|---|
| Page(s) | C6-1000 - C6-1001 | |
| DOI | https://doi.org/10.1051/jphyscol:19786442 | |
The XVth International Conference on low temperature physics
Quantum Fluids and Solids
Superconductivity
J. Phys. Colloques 39 (1978) C6-1000-C6-1001
DOI: 10.1051/jphyscol:19786442
1 Institute of Atomic Energy, Kyoto University, Kyoto, Japan
2 M. Chapellier
3 DPh-G/PSRM - CEN.Saclay - B.P. N°2, 91190 Gif-sur-Yvette, France
4 Charles University, Prague, Czechos.
Quantum Fluids and Solids
Superconductivity
J. Phys. Colloques 39 (1978) C6-1000-C6-1001
DOI: 10.1051/jphyscol:19786442
NMR STUDY OF HEAT TRANSFER IN RUBY (Al2O3, Cr3+) AT VERY LOW TEMPERATURES
M. Chiba1, 2, 3 and M. Rotter41 Institute of Atomic Energy, Kyoto University, Kyoto, Japan
2 M. Chapellier
3 DPh-G/PSRM - CEN.Saclay - B.P. N°2, 91190 Gif-sur-Yvette, France
4 Charles University, Prague, Czechos.
Résumé
Des temps de relaxation très longs de 27Al dans un monocristal de rubis ont été observés à très basses températures, dans un bain de 3He dilué (plus de 20 min. à 80 mK), en champ nul. Le mécanisme de relaxation et la possibilité de refroidissement des spins 27 Al pour l'étude d'ordre nucléaire dans le référentiel du laboratoire sont discutés.
Abstract
The relaxation times of 27Al in a single crystal of ruby in a bath of dilute liquid 3He at zero field were observed to be very long at low temperatures (more than 20 min. at 80 mK). The mechanism of the relaxation and a possibility of cooling 27Al in system to study nuclear magnetic ordering in the laboratory frame are discussed.