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Dynamics near the tricritical point of a3He-4He mixture

Abstract

By means of mode-mode coupling we compute damping constants near the tricritical point of a3He-4He mixture. Both on the coexistence curve and in the tricritical region we find : mass diffusion constant≈|−T t | +1/2, thermal diffusion constantDK T ∼|T−T t | −1/2, and third viscosity∼|T−T t | −3/2, whereT is the temperature andT t is the tricritical temperature. These results imply that damping constant of second sound∼|T−T t |S|−1/2 in the ordered phase.

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Additional information

During the last stages of the writing of this manuscript one of us (M.G.) received a preprint from K. Kawasaki and J. D. Gunton. Both our method and results are similar to those of these authors.

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Grover, M.K., Swift, J. Dynamics near the tricritical point of a3He-4He mixture. J Low Temp Phys 11, 751–756 (1973). https://doi.org/10.1007/BF00654456

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Keywords

  • Viscosity
  • Magnetic Material
  • Thermal Diffusion
  • Mass Diffusion
  • Tricritical Point