  Many-particle electron states in semiconductor quantum dots with
carrier-mediated ferromagnetism are studied theoretically within the
self-consistent Boltzmann equation formalism. Depending on the conditions, a
quantum dot may contain there phases: partially spin-polarized ferromagnetic,
fully spin-polarized ferromagnetic, and paramagnetic phases. The physical
properties of many-body ferromagnetic confined systems come from the competing
carrier-mediated ferromagnetic and Coulomb interactions. The magnetic phases in
gated quantum dots with holes can be controlled by the voltage or via optical
methods.
