Abstract
Pulsed nuclear magnetic resonance measurements of the transverse frequency and magnetization of superfluid in a 98.2% porous aerogel are observed at temperatures reduced significantly below the bulk superfluid transition and are discussed in terms of an isotropic impurity scattering model. Magnetization measurements suggest an equal-spin pairing superfluid. For NMR tipping angles, , the shifts drop abruptly to zero, unlike the known dependence of either the or superfluid phases.
- Received 21 April 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.661
©1995 American Physical Society