Superfluid ${}^3$He in Planar Aerogel

Abstract

We report results of experiments with liquid ${}^3$He confined in a high porosity anisotropic nanostructure which we call planar aerogel. This aerogel consists of nanofibers (with diameters $\sim 10$ nm) which are randomly oriented in the plane normal to the specific axis. We used two samples of planar aerogel prepared using different techniques. We have found that on cooling from the normal phase of ${}^3$He the superfluid transition in both samples occurs into an equal spin pairing superfluid phase. NMR properties of this phase qualitatively agree with the properties of the superfluid A phase in the anisotropic Larkin-Imry-Ma state. We have observed differences between results obtained in the presence and absence of solid paramagnetic ${}^3$He on the aerogel strands. We propose that these differences may be due, at least in part, to a magnetic scattering channel which appears in the presence of solid paramagnetic ${}^3$He.

arXiv comment9 pages, 11 figures, version 2 (misprints corrected)

References in corpus (31)

• Quartz Tuning Fork: Thermometer, Pressure- and Viscometer for Helium Liquids
• Models for Superfluid ${}^3$He in Aerogel
• Polar phase of superfluid 3He in anisotropic aerogel
• On Larkin-Imry-Ma State of 3He-A in Aerogel
• Pairing States of Superfluid 3He in Uniaxially Anisotropic Aerogel
• Strong orientational effect of stretched aerogel on the 3He order parameter
• Orbital glass and spin glass states of 3He-A in aerogel
• New Chiral Phases of Superfluid 3He Stabilized by Anisotropic Silica Aerogel
• Phase diagram of superfluid 3He in "nematically ordered" aerogel
• Impurity Effects of Aerogel in Superfluid ${}^3$He
• Impurity Effects on the A_1-A_2 Splitting of Superfluid 3He in Aerogel
• Magnetization and Spin-Diffusion of Liquid 3He in Aerogel
• Globally Anisotropic High Porosity Silica Aerogels
• Influence of Magnetic Scattering on Superfluidity of 3He in Nematic Aerogel
• Analog of Anderson theorem for the polar phase of liquid 3He in nematic aerogel
• The Superfluid Glass Phase of 3He-A
• Chiral Phases of Superfluid 3He in an Anisotropic Medium
• Spin diffusion in liquid 3He confined in nafen
• Identification of Superfluid Phases of 3He in Uniformly Isotropic 98.2% Aerogel
• Model of Inhomogeneous Impurity Distribution in Fermi Superfluids
• 'Fast Exchange' model visualized with 3He confined in aerogel: a Fermi liquid in contact with a Ferromagnetic solid
• Phenomenological phase diagram of superfluid 3He in a stretched aerogel
• Anisotropic 2D Larkin-Imry-Ma state in polar distorted ABM phase of 3He in "nematically ordered" aerogel
• Stability of superfluid 3He-B in compressed aerogel
• Anisotropic phases of superfluid 3He in compressed aerogel
• Anisotropic Strong Coupling Effects on Superfluid 3He in Aerogels - Conventional Spin-Fluctuation Approach -
• Orientation of the Angular Momentum in Superfluid 3He-A in a Stretched Aerogel
• The Effect of Magnetic Impurities on Superfluid ${}^3$He in Aerogel
• Influence of Exchange Scattering on Superfluid He-3 states in Nematic Aerogel
• Spin diffusion in liquid ${}^3$He confined in planar aerogel
• NMR shifts in ${}^3$He in aerogel induced by demagnetizing fields

Cited by in corpus (2)

• Magnetic Susceptibility of Andreev Bound States in Superfluid ${}^3$He-B
• Planar and Nematic Aerogels: DLCA and Superfluid 3He