Remarkable paramagnetic features of Fermi-Dirac-Pauli plasmas

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3601761· OSTI ID:22046887

Akbari-Moghanjoughi, M ^[1]

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1. Azarbaijan University of Tarbiat Moallem, Faculty of Sciences, Department of Physics, 51745-406 Tabriz (Iran, Islamic Republic of)

In this paper by using the relativistic magnetic susceptibility of a Fermi-Dirac (relativistically degenerate) plasma, quantum magnetohydrodynamics model is used to investigate the propagation of spin-induced (SI) magnetosonic nonlinear excitations in a normally and relativistically degenerate dense electron-ion plasma in the presence of the spin magnetization effect. Based on the conventional pseudopotential method the matching criterion for the evolution of SI solitary structures is evaluated. It is found that, the plasma mass density and strength of the magnetic field have significant effects on excitation and evolution of magnetosonic nonlinear structures in Fermi-Dirac plasmas. Only rarefactive SI magnetosonic solitary structures are found to excite in such plasmas. Furthermore, fundamental differences are shown to exist in magnetosonic soliton dynamics in the two distinct plasma degeneracy regimes, which are due to interplay between the negative pressure-like paramagnetism and positive relativistic degeneracy pressure of electrons. Current investigation can help better understand the electron spin effects on nonlinear wave propagations in strongly magnetized dense astrophysical objects such as white dwarfs and pulsar magnetospheres.

• OSTI ID: 22046887
• Journal Information: Physics of Plasmas, Vol. 18, Issue 7; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
ELECTRONS
EXCITATION
MAGNETIC FIELDS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MAGNETOHYDRODYNAMICS
NONLINEAR PROBLEMS
PARAMAGNETISM
PLASMA WAVES
PULSARS
QUANTUM MECHANICS
RELATIVISTIC PLASMA
RELATIVISTIC RANGE
SOLITONS
SPIN
WAVE PROPAGATION
WHITE DWARF STARS