  The electron dynamics and the mechanisms of power absorption in
radio-frequency (RF) driven, magnetically enhanced capacitively coupled plasmas
(MECCPs) at low pressure are investigated. The device in focus is a
geometrically asymmetric cylindrical magnetron with a radially nonuniform
magnetic field in axial direction and an electric field in radial direction.
The dynamics is studied analytically using the cold plasma model and a
single-particle formalism, and numerically with the inhouse energy and charge
conserving particle-in-cell/Monte Carlo collisions code ECCOPIC1S-M. It is
found that the dynamics differs significantly from that of an unmagnetized
reference discharge. In the magnetized region in front of the powered
electrode, an enhanced electric field arises during sheath expansion and a
reversed electric field during sheath collapse. Both fields are needed to
ensure discharge sustaining electron transport against the confining effect of
the magnetic field. The corresponding azimuthal ExB-drift can accelerate
electrons into the inelastic energy range which gives rise to a new mechanism
of RF power dissipation. It is related to the Hall current and is different in
nature from Ohmic heating, as which it has been classified in previous
literature. The new heating is expected to be dominant in many magnetized
capacitively coupled discharges. It is proposed to term it the "{\mu}-mode" to
separate it from other heating modes.
