Figure 1

The ESR spectra of Mg-acceptor in GaN crystal after two thermal annealing procedures: RTA (solid line), and annealing in NH₃ atmosphere (dotted line). Microwave power P = 2 mW, modulation amplitude A = 0.2 mT. The narrow resonance line at higher magnetic field is due to the quartz sample holder.

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© 1998 The Materials Research Society