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Дата последнего поиска статьи во внешних источниках: 11 апреля 2017 г.
Аннотация:The extraordinary waves in spin-1/2 quantum plasma are studied. The evolutions of spin-up and
spin-down electrons are considered separately. Hence, the separate spin evolution quantum hydrodynamics
is used as the tool of research. It is demonstrated that the spin polarization of electrons
modifies the spectrum of the lower extraordinary wave (LEW). An increase of the frequency at the
large wave vector due to the spin modified Fermi pressure is found for the cyclotron frequency
smaller than the Langmuir frequency. Existence of the extraordinary spin electron acoustic wave
(SEAW) is demonstrated. Spectrum of the extraordinary SEAW is calculated. This spectrum is
located below the spectrum of the LEW for the cyclotron frequency smaller than the Langmuir frequency
and the spectrum located between spectrums of the upper extraordinary wave and the LEW
for the cyclotron frequency larger than the Langmuir frequency. Presence of the extraordinary
SEAW spectrum in the area usually occupied by the LEW spectrum decreases frequency of the
LEW for large wave vectors, if the cyclotron frequency is larger than the Langmuir frequency. At
the intermediate wave vectors, the LEW frequency is increased by the spin modified Fermi pressure.