title: Modification of the superfluid 3He phase diagram by impurity scattering.
abstract: The effect of impurity scattering on the phase diagram of pure superfluid 3He has been investigated by acoustic techniques near the bulk polycritical pressure. Impurities were introduced with a 98% porous silica aerogel. In zero applied field, the equilibrium phase is a B phase, consistent with predictions from isotropic scattering. The superfluid transition in a magnetic field at 25 bars is from normal to A phase and is independent of the magnetic field up to 2.9 kG. A first-order phase transition between A and B superfluids is observed with surprisingly strong supercooling in both zero and nonzero applied field.
authors.affiliation: Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: G
authors.initials: G
authors.lastname: Gervais
authors.forename: T M
authors.initials: TM
authors.lastname: Haard
authors.forename: R
authors.initials: R
authors.lastname: Nomura
authors.forename: N
authors.initials: N
authors.lastname: Mulders
authors.forename: W P
authors.initials: WP
authors.lastname: Halperin