THE ORDER-PARAMETER EQUATIONS OF SUPERFLU ID FERMI-LIQUID WITH SPIN-TRIPLET PAIRING NEAR T-C IN MAGNETIC-FIELD

This article is devoted to description of equilibrium properties of su perfluid phases of(3)He in magnetic field at temperatures near the nor mal-superfluid point T-c. the Landau Fermi-liquid (F-L) approach gener alized to superfluid Fermi-liquids (SFLs) is used. Equations for the o rder parameter paramagnetic SFL with spin-triplet pairing in static an d uniform (DC) moderately strong magnetic field are derived without ta king into account strong-coupling (SC) effects. An integro-differentia l equation is deduced for the order parameter in the general case of s pin-triplet pairing (spin of a pair is s=1, orbital moment l of a pair is any odd number). It is valid in the approximation of small space i nhomogeneities of the SFL for external DC magnetic field at temperatur es near T-c. In the case of spin-triplet p-wave pairing a Ginzburg-Lan dau (GL) equation is derived for the order parameter A(aj) (complex 3x 3 matrix). Corrections to the coefficients in the GL eq. are resulted from taking into account the influence of moderately strong DC magneti c field and spin-excahnge F-L interaction by the theory of permutation s. In such fields these corrections can be of the same order of magnit ude as the so-called <<nontrivial>> SC corrections to the GL eq. (or e ven exceed them) and are much higher than the particle-hole asymmetric contribution. The above corrections are connected with the deformatio n of the order parameter in moderate magnetic fields and are of intere st at description of(3)He-B at low pressures.