Finite-temperature calculations for spin-polarized asymmetric nuclear matter with the lowest order constrained variational method

Abstract

The lowest order constrained variational technique has been used to investigate some of the thermodynamic properties of spin-polarized hot asymmetric nuclear matter, such as the free energy, symmetry energy, susceptibility, and equation of state. We have shown that the symmetry energy of the nuclear matter is substantially sensitive to the value of spin polarization. Our calculations show that the equation of state of the polarized hot asymmetric nuclear matter is stiffer for higher values of the polarization as well as the isospin asymmetry parameter. Our results for the free energy and susceptibility show that spontaneous ferromagnetic phase transition cannot occur for hot asymmetric matter.

Ferromagnetic and antiferromagnetic spin-ordering stabilities of asymmetric nuclear matter: Lowest-order constrained variational method

“…We have also calculated the thermodynamic properties of polarized neutron matter [50] and polarized symmetric nuclear matter [51], such as the free energy, magnetic susceptibility, entropy, and pressure using the LOCV method at finite temperature. Recently, we have calculated the properties of spin-polarized asymmetric nuclear matter at finite temperature by using the LOCV method and parabolic approximation [52]. Our calculations do not show any transition to a ferromagnetic phase for hot neutron matter and hot symmetrical and asymmetrical nuclear matter.…”

Investigation of the field-induced ferromagnetic phase transition in spin-polarized neutron matter: A lowest order constrained variational approach

“…In our previous works, we have studied the spin polarized neutron matter [29], symmetric nuclear matter [30], asymmetric nuclear matter [31], and neutron star matter [31] at zero temperature using LOCV method with the realistic strong interaction in the absence of magnetic field. We have also investigated the thermodynamic properties of the spin polarized neutron matter [32], symmetric nuclear matter [33], and asymmetric nuclear matter [34] at finite temperature with no magnetic field. In the above calculations, our results do not show any spontaneous ferromagnetic phase transition for these systems.…”

Calculation of nuclear matter in the presence of strong magnetic field using LOCV technique

“…In our previous works, we have studied the spin polarized neutron matter [14], symmetric nuclear matter [15], asymmetric nuclear matter [16], and neutron star matter [16] at zero temperature using the lowest order constraint variational (LOCV) method with the realistic strong interaction in the absence of magnetic field. We have also investigated the thermodynamic properties of these systems at finite temperature with no magnetic field [17][18][19].…”