Abstract
We have conducted torsional oscillator measurements of the superfluid density in 4He-filled aerogel where the aerogel density is 0.20g/cc. The superfluid densiyy ρ{variant}s is observed to obey a power-law ρ{variant}s=ρ{variant}sotξ over a reduced temperature range 10-4.3 <t<10-1.8 with rms deviations of less than 2 percent. The exponent ξ is 0.812±0.004. This value is remarkably close to the exponent, 0.813±0.009, reported earlier for an aerogel sample of density 0.13g/cc.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 549-550 |
| Number of pages | 2 |
| Journal | Physica B: Physics of Condensed Matter |
| Volume | 165-166 |
| Issue number | PART 1 |
| DOIs | |
| State | Published - Aug 1990 |
Bibliographical note
Funding Information:The work reported here was supported by the National Science Foundation through grant NSF-tRlR84-18605 and by the Cornell Material Science Center through grant NSF-tUR85-16616-A02, MSC Report 6901.
Funding Information:
P.A.C. acknowledges the support of an AT&T Bell Laboratories Ph.D Scholarship. G.K.S.W. acknowledges the support of an A.D. White Fellowship from Cornell University and a 1967 Postgraduates Fellowship from the Natural Sciences and Engineering Research Council of Canada.