Specific heat of normal and superfluid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>on the melting curve

Halperin, W. P.; Archie, Charles N.; Rasmussen, Finn; Alvesalo, T.A.; Richardson, Robert C.

doi:10.1103/physrevb.13.2124

Cited by 133 publications

(19 citation statements)

References 25 publications

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“…6) That the two phase transitions occurring in magnetic field were second order was verified by the observed discontinuities in the specific heat. 7) The evidence that the A 1 phase apparently solely contained a spin polarized condensate came from the NMR experiments which showed that the transverse nuclear magnetic resonance frequency shift matched precisely those predicted for A 1 phase. 8) As a further confirmation, the measured longitudinal nuclear magnetic resonance frequency in A phase decreased sharply towards T c2 and would disappear within the experimental sensitivity in A 1 phase.…”

Section: Introductionmentioning

confidence: 86%

Spin Polarized Superfluid³He A₁

Kojima

Ishimoto

2008

J. Phys. Soc. Jpn.

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Under applied magnetic field, the originally single superfluid 3 He transition near 3 mK in zero field splits into two transitions between which a new A 1 phase emerges. The two second order transitions are marked by abrupt changes in viscosity, zero sound attenuation and nuclear magnetic resonance. To date, the maximum magnetic field for producing A 1 phase is 15 T. The A 1 phase has been identified with a spin-polarized (ferromagnetic) superfluid system which breaks the relative symmetry between spin, orbit and gauge spaces. A superfluid mass current in A 1 is simultaneously a spin current resulting in the propagation of spin-entropy wave. Experiments with spin-entropy wave provide measurements of anisotropic superfluid density and strong coupling parameters, spin diffusion coefficient and texture transformations. Owing to the spin-polarized nature, superflows may be generated by applied magnetic field gradients and measured from the induced magnetic fountain pressure. The mechanical spin density detector is developed to measure the spin relaxation in A 1 phase. The observed unexpected temperature dependence of the spin relaxation time gives evidence that the A 1 phase contains a small amount of the predicted minority spin condensate from dipolar interaction energy.KEYWORDS: spin-polarized system, superfluid 3 He, magnetic fountain effect, spin pump, second sound, high magnetic field

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Section: Introductionmentioning

confidence: 86%

Spin Polarized Superfluid³He A₁

Kojima

Ishimoto

2008

J. Phys. Soc. Jpn.

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“…Inserting (19) and (20) into the mobility equations (14) and ( The parallel mobility is lower than the perpendicular one* because there are *Note that the numerical evaluations o~ ReL 13 contain computational mistakes, which led to the false conclusion/zip > ~. more quasiparticles moving in directions parallel to/, where the energy gap has nodes, than in the perpendicular direction.…”

Section: Ion Mobility Tensormentioning

confidence: 99%

Mobility tensor of negative ions in superfluid 3He-A

1980

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The mobility tensor of negative ions in the A phase of superfluid 3He is calculated for temperatures close to To. In this regime the scattering of superfluid quasiparticles from an electron bubble is practically elastic and the mobility tensor is expressed in terms of momentum transfer cross sections for an ion at rest. These generalized transport cross sections are obtained from the quasiparticle-ion scattering T-matrix, which we evaluate in terms of the normal state scattering amplitude. The p-wave pairing correlations in the intermediate states result in important interference effects among all partial waves in the scattering process, and, in addition, for the low-energy quasiparticles they lead to resonant states below the gap edge. These phenomena modify the scattering amplitude in the superfluid in an essential way and the differential quasiparticle-ion cross section is found to display strongly anisotropic, energy-dependent variations on the scale of the superfluid energy gap. We find that, in contrast to simple approximations, for low quasiparticle energies the parallel and perpendicular momentum transfer cross sections are very different from one another. Close to To, the calculated mobility remains rather isotropic, but at lower temperatures the anisotropy is considerably larger than predicted by simple approximations for the cross section. The computed results are compared with the available measurements.

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“…This approach has been used to describe phenomenologically specific heat data of isotropic "strong" coupling superconductors by adjusting the zero-temperature energy gap. 6~ Following this prescription Halperin et al 3 adjusted the zero-temperature gap to account for the specific heat jump at TA from the normal fluid to the B phase. These results are shown in their Fig.…”

Section: Specific Heat Of the Superfluid Phasesmentioning

confidence: 99%

Properties of melting 3He: Specific heat, entropy, latent heat, and temperature

et al. 1978

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A sequence of experiments has been performed to measure thermal properties of liquid and solid 3He between the temp3eratures 1 and 25 mK at melting curve densities. A two-phase mixture of 'He sample was self-cooled by the Pomeranchuk method. A heat pulse technique was used, combined with measurements of pressure and volume, to yield separate determinations of liquid and solid properties: the specific heat of liquid 3He in the normal Fermi liquid and superfluid phases; the entropy of solid 3He above and through a nuclear magnetic transition at 1.10inK; and an absolute thermodynamic temperature scale based on measurement of latent heat of conversion of liquid to solid.

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Specific heat of normal and superfluidHe3on the melting curve

Cited by 133 publications

References 25 publications

Spin Polarized Superfluid³He A₁

Spin Polarized Superfluid³He A₁

Mobility tensor of negative ions in superfluid 3He-A

Properties of melting 3He: Specific heat, entropy, latent heat, and temperature

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Specific heat of normal and superfluidHe3on the melting curve

Cited by 133 publications

References 25 publications

Spin Polarized Superfluid3He A1

Spin Polarized Superfluid3He A1

Mobility tensor of negative ions in superfluid 3He-A

Properties of melting 3He: Specific heat, entropy, latent heat, and temperature

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Product

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Spin Polarized Superfluid³He A₁

Spin Polarized Superfluid³He A₁