THE SPIN HAMILTONIAN PARAMETERS CALCULATION OF ~(14)N AND ~(15)N IN NATURAL TYPE I DIAMOND

摘要

The main purpose of this work is to present the ESR spectra and calculate the spin Hamiltonian parameters of ~(14)N and ~(15)N impurities in natural diamond. The ESR spectra of diamond crystal were measured on ESR spectrometer operating at X-band microwave frequency. The results of ESR spectra show that the diamond has a P1 center. This center gives rise to three strong resonance absorption peaks at θ = 90°, φ = 0° due to hyperfine interaction between electron spin and nuclear spin of ~(14)N. The ESR spectra of ~(15)N impurity consist of two satellites at the same rotation angle (φ). The efiects of isolated substitution nitrogen on carbon atom produced a symmetric distortion from Td to C3V symmetry. According to this symmetry, the resonance magnetic field positions of ESR spectra for the rotation angles of 0°, 90° and 180°are almost overlap. The g-factor values and spin Hamiltonian parameters of ~(14)N and ~(15)N are: g = 2.0019, A⊥= 29.73,A|| = 40.24 and g = 2:0019, A⊥ =-39.90, A||=-57.05, respectively.