Temperature Dependence of Viscosity in Normal Fluid $^3$He Below 800mK Determined by a Micro-electro-mechanical Oscillator
Abstract
A micro-electro-mechanical system vibrating in its shear mode was used to study the viscosity of normal liquid He from 20mK to 770mK at 3bar, 21bar, and 29bar. 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 to on cooling, indicating a transition from the Stokes flow to the Couette flow regime.
Keywords
Cite
@article{arxiv.1604.08554,
title = {Temperature Dependence of Viscosity in Normal Fluid $^3$He Below 800mK Determined by a Micro-electro-mechanical Oscillator},
author = {M. Gonzalez and W. G. Jiang and P. Zheng and C. S. Barquist and H. B. Chan and Y. Lee},
journal= {arXiv preprint arXiv:1604.08554},
year = {2016}
}
Comments
The following article has been submitted for publication to Physical Review B