Optical and magnetic properties of the ground state of Cr(3+) doping ions in REM(3)(BO(3))(4) single crystals

New data about the state of Cr(3+) doping ions in a single crystal of YGa(3)(BO(3))(4) have been obtained by studying different methods. Using electron paramagnetic resonance, it was found that the Cr(3+) ions substitute the trivalent gallium ions. The obtained spin Hamiltonian parameters of the Cr(3+) ions in the YGa(3)(BO(3))(4) single crystal (g = 1.9743 ± 0.0004; D = −0.465 ± 0.001 cm(−1); E = −0.013 ± 0.001 cm(−1)) were analyzed and compared with those in TmAl(3)(BO(3))(4), EuAl(3)(BO(3))(4), and YAl(3)(BO(3))(4). The deviation of the Z-axis in the spectrum from the crystallographic axis С(3) is 1,7 degrees in YGa(3)(BO(3))(4). In situ X-ray diffraction was used to study the structural and elastic properties of huntite-type borates in the temperature range of RT-1073 K. In the radioluminescence (RL) spectra, the Cr(3+)-related emission bands were observed in the red wavelength range, and the presence of other defect-related bands was also registered in some cases. Thermally stimulated luminescence (TSL) glow curves were acquired over a wide temperature range, and the trap depths of the most prominent bands were calculated. The (11)B NMR spectra show that two nonequivalent spectral components exist for BO(3) structural elements.