Temperature dependence of viscosity in normal fluid He-3 below 800 mK determined by a microelectromechanical oscillator

Article

关键词: FERROMAGNETIC FERMI LIQUIDS;    TRANSPORT-COEFFICIENTS;    TUNING FORK;    ZERO SOUND;   

DOI  :  10.1103/PhysRevB.94.014505

来源: SCIE

【 摘 要 】

A microelectromechanical system vibrating in its shear mode was used to study the viscosity of normal liquid He-3 from 20 to 770 mK at 3, 21, and 29 bars. The damping coefficient of the oscillator was determined by frequency sweeps through its resonance at each temperature. Using a slide film damping model, the viscosity of the fluid was obtained. Our viscosity values are compared with previous measurements and with calculated values from Fermi-liquid theory. The crossover from the classical to the Fermi-liquid regime is manifest in the temperature dependence of viscosity. In the Fermi-liquid regime, the temperature dependence of viscosity changes from T-1 to T-2 on cooling, indicating a transition from the Stokes flow to the Couette flow regime.

【 授权许可】

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