Abstract
Direct nuclear demagnetization is used to cool high density solid3He into the magnetically ordered phases. The pressure change in the samples is detected by a capacitive strain gauge. The entropy of the samples is removed by precooling to a temperature of 0.5 mK in a field of 2.5 T. For a bcc sample with a molar volume of 20.10 cm3/mol, two magnetic transitions have been observed. A similar experiment on an hcp sample with a molar volume of 19.65 cm3/mol is being done. Preliminary data indicates no abrupt change in the pressure as observed in the bcc sample.
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Lang, T., Moyland, P.L., Sergatskov, D.A. et al. Pressure measurement during nuclear demagnetization of BCC and HCP solid3He. J Low Temp Phys 101, 677–681 (1995). https://doi.org/10.1007/BF00753373
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DOI: https://doi.org/10.1007/BF00753373