Room-temperature ferromagnetism in dielectric GaN(Gd)
arXiv:0905.0500 · doi:10.1063/1.3143670
Abstract
We present an explanation of recently observed giant magnetic moment and room-temperature ferromagnetism in the dielectric GaN doped with Gd. Our approach uses the polarization mechanism of exchange interaction, which occurs if the d-level of Gd appears in the bandgap close to the valence band edge. Calculated ferromagnetic critical temperature and the value of the magnetic moment well correspond to experimental findings.
9 pages, 3 figures submitted to Applied Physics Letters