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Two-stage nuclear demagnetization refrigerator reaching 27 µK

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Abstract

A two-stage nuclear demagnetization refrigerator with large cooling capacity has been constructed and successfully operated. The first stage consists of 11 moles of the Van Vleck paramagnet PrNi5 in an initial field of 6 T, and the second stage consists effectively of 19 moles of copper in an initial field of 7.6 T. The minimum temperature as measured with pulsed platinum NMR is 27 µK, the lowest ever obtained in a low-field experimental region.

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Authors and Affiliations

  1. Institute for Solid State Physics, University of Tokyo, Tokyo, Japan

    H. Ishimoto, N. Nishida, T. Furubayashi, M. Shinohara, Y. Takano, Y. Miura & K. Ôno

Authors
  1. H. Ishimoto
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  2. N. Nishida
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  3. T. Furubayashi
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  4. M. Shinohara
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  5. Y. Takano
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  6. Y. Miura
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  7. K. Ôno
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Ishimoto, H., Nishida, N., Furubayashi, T. et al. Two-stage nuclear demagnetization refrigerator reaching 27 µK. J Low Temp Phys 55, 17–31 (1984). https://doi.org/10.1007/BF00683649

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  • DOI: https://doi.org/10.1007/BF00683649

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