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Unusual Behavior of a MEMS Resonator in Superfluid4He

✍ Scribed by M. Gonzalez, P. Zheng, B. H. Moon, E. Garcell, Y. Lee…


Book ID
120720132
Publisher
Springer US
Year
2012
Tongue
English
Weight
857 KB
Volume
171
Category
Article
ISSN
0022-2291

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Critical behavior of superfluid 4He in p
✍ J.R. Beamish; Kevin Warner 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 178 KB

We have made ultrasonic measurements of the superfluid density and the dissipation in several porous alumina samples filled with 4He. In one sample (formed by a sol-gel process) with high porosity (92%) and large pores (R=1600 A), we found that the superfluid density disappeared at the transition wi