Phase Diagram of Superfluid <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>-<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>A</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></math></span>

U. E. Israelsson; B. C. Crooker; H. M. Bozler; C. M. Gould

doi:10.1103/PhysRevLett.53.1943

Phase Diagram of Superfluid ${}^{3}{He}$ - $A_{1}$

U. E. Israelsson, B. C. Crooker, H. M. Bozler, and C. M. Gould

Phys. Rev. Lett. 53, 1943 – Published 12 November 1984; Erratum Phys. Rev. Lett. 54, 254 (1985)

Abstract

The $A_{1}$ and $A_{2}$ transitions, which delineate the $A_{1}$ phase of superfluid ${}^{3}{He}$ , are measured in magnetic fields up to 3 T over a wide range of pressures. At zero pressure the $A_{1} - A_{2}$ splitting is found to be smaller than at melting pressure by a factor of 5. Strong-coupling effects are similarly smaller by an order of magnitude.