Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-01-12
Phys.Rev. C71 (2005) 055802
Physics
Nuclear Physics
Nuclear Theory
REVTEX4 - 18 pages, 8 figures, 2 tables Revised according to referee comments - Submitted to Phys. Rev. C
Scientific paper
10.1103/PhysRevC.71.055802
The properties of spin polarized neutron matter are studied both at zero and finite temperature using Skyrme-type interactions. It is shown that the critical density at which ferromagnetism takes place decreases with temperature. This unexpected behaviour is associated to an anomalous behaviour of the entropy which becomes larger for the polarized phase than for the unpolarized one above a certain critical density. This fact is a consequence of the dependence of the entropy on the effective mass of the neutrons with different third spin component and a new constraint on the parameters of the effective Skyrme force is derived in order to avoid such a behaviour.
Polls Artur
Rios Arnau
Vidana Isaac
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