Thermal activation energies of Mg in GaN:Mg measured by the Hall effect and admittance spectroscopy.

Studies the thermal activation energies of magnesium in GaN:Mg measured by the Hall effect and admittance spectroscopy. Growing of a series of GaN:Mg structures in molecular beam epitaxy using either one or two radio frequency nitrogen sources; Reasons for the apparently small acceptor energies from the admittance spectroscopy measurement.