  We study the manifestation of the Nernst effect in the Corbino disk subjected
to the normal external magnetic field and to the radial temperature gradient.
The Corbino geometry offers a precious opportunity for the direct measurement
of the magnetization currents that are masked by kinetic contributions to the
Nernst current in the conventional geometry. The magnetization currents, also
referred to as the edge currents, are independent on the conductivity of the
sample which is why they can be conveniently described within the thermodynamic
approach. They can be related to the Landau thermodynamic potential for an
infinite system. We demonstrate that the observable manifestation of this,
purely thermodynamic, Nernst effect consists in the strong oscillations of the
magnetic field measured in the center of the disk as a function of the external
field. The oscillations depend on the temperature difference at the edges of
the disk. Dirac fermions and 2D electrons with a parabolic spectrum are
characterized by oscillations of different phase and frequency. We predict
qualitatively different power dependencies of the magnitude of the Nernst
signal on the chemical potential for normal and Dirac carriers.
