标题： 费米-狄拉克等离子体的显著顺磁特性 显示英文标题

标题： Remarkable paramagnetic features of Fermi-Dirac plasmas

摘要： 在本文中，通过使用费米-狄拉克（相对论简并）等离子体的相对论磁化率，量子磁流体动力学（QMHD）模型被用来研究在自旋磁化效应存在的情况下，正常和相对论简并的高密度电子-离子等离子体中自旋诱导（SI）磁声非线性激发的传播。 基于传统的伪势方法，评估了SI孤立结构演化的匹配准则。 发现等离子体质量密度和磁场强度对费米-狄拉克等离子体中磁声非线性结构的激发和演化有显著影响。 仅发现稀疏型SI磁声孤立结构在这种等离子体中被激发。 此外，展示了在两种不同的等离子体简并度情况下磁声孤子动力学的基本差异，这是由于电子的负自旋顺磁压力和正相对论简并压力之间的相互作用所致。 当前的研究有助于更好地理解强磁场致密天体如白矮星和脉冲星磁层中的电子自旋效应对非线性波传播的影响。 显示英文摘要

摘要： In this paper by using the relativistic magnetic susceptibility of a Fermi-Dirac (relativistically degenerate) plasma, quantum magnetohydrodynamics (QMHD) 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 is due to interplay between the negative spin paramagnetism pressure-like 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.