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Conversion Between \(^3\)He Melting Curve Scales Below 100 mK

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Abstract

We provide the conversion parameters to allow a \(^3\)He melting curve thermometer to be used to calibrate secondary thermometers to the PLTS2000 temperature scale (Rusby et al. in J Low Temp Phys 149(3):156, 2007). Additional fits to the phase diagram of superfluid \(^3\)He are also provided using the melting curve P, T measurements and of the phase diagram of superfluid \(^3\)He (Greywall in Phys Rev B 33(11):7520, https://doi.org/10.1103/PhysRevB.33.7520, 1986) as a bridge. Further, the melting curve measurements of Osheroff and Yu (Phys Lett A 77(6):458, https://doi.org/10.1016/0375-9601(80)90539-3, 1980) are also used to extend the scale below 0.9 mK.

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Acknowledgements

This research was supported by a Grant from the National Science Foundation under DMR-2002692.

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  1. Department of Physics, Cornell University, Ithaca, NY, 14853, USA

    Yefan Tian, Eric Smith & Jeevak Parpia

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  1. Yefan Tian
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  2. Eric Smith
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  3. Jeevak Parpia
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Correspondence to Jeevak Parpia.

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Tian, Y., Smith, E. & Parpia, J. Conversion Between \(^3\)He Melting Curve Scales Below 100 mK. J Low Temp Phys 208, 298–311 (2022). https://doi.org/10.1007/s10909-022-02721-z

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  • DOI: https://doi.org/10.1007/s10909-022-02721-z

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