Abstract
We report on continuous-wave NMR measurements of the energy gaps of the A-like and B-like superfluid phases of He{sup 3} at 28.4 mT confined to a 99.3% porosity silica aerogel. The gaps are suppressed by the presence of the aerogel in a temperature-independent manner, but the suppression is considerably stronger than expected from the suppression of T{sub c}. We then use our measurements to calculate the free energy ratio between the A-like and B-like phases. The equilibrium AB transition temperature, derived from where this ratio reaches unity, is consistent with previous measurements of the initial displacement of the pinned AB interface on warming. On this basis, we present for the first time the equilibrium phase diagram of the A-like and B-like phases of superfluid He{sup 3} in aerogel.
Baumgardner, J E;
Osheroff, D D
[1]
- Department of Physics, Stanford University, Stanford, California 94305-4060 (United States)
Citation Formats
Baumgardner, J E, and Osheroff, D D.
Phase diagram of superfluid He{sup 3} in 99.3% porosity aerogel.
United States: N. p.,
2004.
Web.
doi:10.1103/PhysRevLett.93.155301.
Baumgardner, J E, & Osheroff, D D.
Phase diagram of superfluid He{sup 3} in 99.3% porosity aerogel.
United States.
https://doi.org/10.1103/PhysRevLett.93.155301
Baumgardner, J E, and Osheroff, D D.
2004.
"Phase diagram of superfluid He{sup 3} in 99.3% porosity aerogel."
United States.
https://doi.org/10.1103/PhysRevLett.93.155301.
@misc{etde_20617593,
title = {Phase diagram of superfluid He{sup 3} in 99.3% porosity aerogel}
author = {Baumgardner, J E, and Osheroff, D D}
abstractNote = {We report on continuous-wave NMR measurements of the energy gaps of the A-like and B-like superfluid phases of He{sup 3} at 28.4 mT confined to a 99.3% porosity silica aerogel. The gaps are suppressed by the presence of the aerogel in a temperature-independent manner, but the suppression is considerably stronger than expected from the suppression of T{sub c}. We then use our measurements to calculate the free energy ratio between the A-like and B-like phases. The equilibrium AB transition temperature, derived from where this ratio reaches unity, is consistent with previous measurements of the initial displacement of the pinned AB interface on warming. On this basis, we present for the first time the equilibrium phase diagram of the A-like and B-like phases of superfluid He{sup 3} in aerogel.}
doi = {10.1103/PhysRevLett.93.155301}
journal = []
issue = {15}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Oct}
}
title = {Phase diagram of superfluid He{sup 3} in 99.3% porosity aerogel}
author = {Baumgardner, J E, and Osheroff, D D}
abstractNote = {We report on continuous-wave NMR measurements of the energy gaps of the A-like and B-like superfluid phases of He{sup 3} at 28.4 mT confined to a 99.3% porosity silica aerogel. The gaps are suppressed by the presence of the aerogel in a temperature-independent manner, but the suppression is considerably stronger than expected from the suppression of T{sub c}. We then use our measurements to calculate the free energy ratio between the A-like and B-like phases. The equilibrium AB transition temperature, derived from where this ratio reaches unity, is consistent with previous measurements of the initial displacement of the pinned AB interface on warming. On this basis, we present for the first time the equilibrium phase diagram of the A-like and B-like phases of superfluid He{sup 3} in aerogel.}
doi = {10.1103/PhysRevLett.93.155301}
journal = []
issue = {15}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Oct}
}