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Circularly polarized modes in magnetized spin plasmas

Published online by Cambridge University Press:  02 September 2010

A. P. MISRA,
G. BRODIN,
M. MARKLUND and
P. K. SHUKLA
A. P. MISRA
Affiliation:
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden (mattias.marklund@physics.umu.se)
G. BRODIN
Affiliation:
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden (mattias.marklund@physics.umu.se)
M. MARKLUND
Affiliation:
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden (mattias.marklund@physics.umu.se)
P. K. SHUKLA
Affiliation:
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden (mattias.marklund@physics.umu.se)
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Abstract

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The influence of the intrinsic spin of electrons on the propagation of circularly polarized waves in a magnetized plasma is considered. New eigenmodes are identified, one of which propagates below the electron cyclotron frequency, one above the spin-precession frequency, and another close to the spin-precession frequency. The latter corresponds to the spin modes in ferromagnets under certain conditions. In the non-relativistic motion of electrons, the spin effects become noticeable even when the external magnetic field B0 is below the quantum critical magnetic field strength, i.e. B0 < BQ = 4.4138 × 109T and the electron density satisfies n0 ≫ nc ≃ 1032m−3. The importance of electron spin (paramagnetic) resonance (ESR) for plasma diagnostics is discussed.

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