Abstract
Experimental studies of the nuclear spin-lattice relaxation times in BCC helium three are reported for high molar volumes and low temperatures close to the minimum in the melting curve. The results show the existence of a new relaxation mechanism at low temperatures with an approximately linear temperature dependence (T 1 ∝T −1). An analysis of the vacancy-induced relaxation shows that both the vacancy formation energy and the vacancy mobility decrease dramatically as a function of density on approaching the maximum possible molar volume (minimum density) of the solid. A possible interpretation of both the new relaxation mechanism and the vacancy properties is outlined.
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Chapellier, M., Bassou, M., Devoret, M. et al. Measurements of the nuclear spin-lattice relaxation times in BCC3He for high magnetic fields, high molar volumes, and low temperatures. J Low Temp Phys 59, 45–81 (1985). https://doi.org/10.1007/BF00681504
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DOI: https://doi.org/10.1007/BF00681504