VISCOSITY OF HIGHLY POLARIZED VERY DILUTE 3He-4He MIXTURES

Autor:	H. Akimoto, E. D. Adams, Donald Candela, Neil Sullivan, Jian-Sheng Xia, William J. Mullin
Rok vydání:	2002
Předmět:	Viscosity Materials science Condensed matter physics Spin polarization Field (physics) Spin states Scattering rate Quasiparticle Viscometer Statistical and Nonlinear Physics Condensed Matter Physics
Zdroj:	International Journal of Modern Physics B. 16:3117-3122
ISSN:	1793-6578 0217-9792
DOI:	10.1142/s0217979202013705
Popis:	We present vibrating - wire viscosity measurements on a very dilute 3 He -4 He mixture (χ3 = 150 ppm ) in fields up to 14.8 T and temperatures down to 3 mK. The 3 He spin polarization is greater than 99% for the highest field and lowest temperature used. In these conditions, the s-wave scattering rate decreases due to a lack of quasiparticles with the minority spin state. This enhances all transport coefficients including the viscosity. At the lowest temperature, the hydrodynamic damping of the viscometer in a 14.8 T field was more than 10 times larger than in low fields. This indicates a many-fold increase in the mixture viscosity due to spin polarization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4b439f4638bc5b89e1873a325e89ed04 https://doi.org/10.1142/s0217979202013705 Zobrazit plný text záznamu