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Thermodynamic Properties of Multilayer 3He Films Described by High Temperature Series Expansions of the Multiple Spin Exchange Hamiltonian

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Abstract

We report high precision NMR measurements of the susceptibility of 3 He films adsorbed on graphite in a the temperature range 4-300 mK using a fine coverage grid between 0.185 and 0.285 atoms/Å 2. High temperature series expansions of the multiple spin exchange Hamiltonian fit accurately the susceptibility as well as available heat capacity data, providing a consistent description of the structural and thermodynamic properties of 3 He films. A long standing paradox for the ferromagnetic regime (heat capacity and susceptibility are described by the Heisenberg model, but with different exchange constants) is quantitatively explained by the MSE model.

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Authors and Affiliations

  1. Centre de Recherches sur les Très Basses Températures, CNRS, BP 166, 38042, Grenoble, France

    C. Bäuerle, J. Bossy, Yu. M. Bunkov, A.-S. Chen & H. Godfrin

  2. SPEC, Commissariat à l'Energie Atomique, CE Saclay, 91191, Gif-sur-Yvette, France

    M. Roger

Authors
  1. C. Bäuerle
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  2. J. Bossy
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  3. Yu. M. Bunkov
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  4. A.-S. Chen
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  5. H. Godfrin
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  6. M. Roger
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Bäuerle, C., Bossy, J., Bunkov, Y.M. et al. Thermodynamic Properties of Multilayer 3He Films Described by High Temperature Series Expansions of the Multiple Spin Exchange Hamiltonian. Journal of Low Temperature Physics 110, 345–350 (1998). https://doi.org/10.1023/A:1022545002615

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  • DOI: https://doi.org/10.1023/A:1022545002615

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