Measurement of Superfluid ³He Film Flow by Inter-digitated Capacitors: Proceedings of the Symposium on Quantum Fluids and Solids, QFS2003

Author： Saitoh M. Ikegami H. Mukuda H. Kono K.

Publisher： Springer Publishing Company

ISSN： 0022-2291

Source： Journal of Low Temperature Physics, Vol.134, Iss.1-2, 2004-01, pp. : 357-362

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Abstract

We report the measurements of the critical current of superfluid ³He film for the thickness of 0.47 µm. By employing inter-digitated capacitors, 2.5×10⁻² mm³³He can be manipulated with 0.4% resolution. Critical current J^f_c of superfluid ³He film were observed for the onset of dissipative flow. The magnitude of measured J^f_c is considerably smaller than the theoretically predicted pair-breaking critical current. This result indicates that another mechanism must participate in the dissipation of superflow.

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