Electron Paramagnetic Resonance

Invariants in the paramagnetic resonance spectra of impurity crystals

“…Introduction -Dielectric crystals with paramagnetic impurities are known to be classic objects of optical and electron paramagnetic resonance (EPR) spectroscopy and have remained popular materials of present-day photonics and optoelectronics [1][2][3][4]. The advantages of the impurity crystals are related to the fact that their properties can be significantly modified by small amounts of dopants without affecting the structure and macroscopic symmetry of the crystal [5][6][7]. For many applications, dielectric crystals doped with paramagnetic impurities acquire unique magnetic (spin-related) properties [8][9][10][11].…”