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Antiferromagnetism of nuclear matter in the model with effective Gogny interaction

Title
Antiferromagnetism of nuclear matter in the model with effective Gogny interaction
Authors
Isayev A.A.Yang J.
Ewha Authors
양종만
SCOPUS Author ID
양종만scopusscopus
Issue Date
2006
Journal Title
Physics of Atomic Nuclei
ISSN
1063-7788JCR Link
Citation
Physics of Atomic Nuclei vol. 69, no. 7, pp. 1220 - 1227
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The possibility of ferromagnetic (FM) and antiferromagnetic (AFM) phase transitions in symmetric nuclear matter is analyzed within the framework of a Fermi liquid theory with effective Gogny interaction. It is shown that, at some critical density, nuclear matter with the D1S effective force undergoes a phase transition to the AFM spin state (opposite directions of neutron and proton spins). The self-consistent equations of spin-polarized nuclear matter with the D1S force have no solutions corresponding to FM spin ordering (the same direction of neutron and proton spins) and, hence, the FM transition does not appear. The AFM spin polarization parameter is found for zero and finite temperature. It is shown that the AFM spin polarization parameter of partially polarized nuclear matter at low enough temperatures increases with temperature. The entropy of the AFM spin state for some temperature range is larger than the entropy of the normal state. Nevertheless, the free energy of the AFM spin state is always less than the free energy of the normal state, and the AFM spin-polarized state is preferable for all temperatures below the critical temperature. © Pleiades Publishing, Inc., 2006.
DOI
10.1134/S1063778806070209
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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