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Vazhenin, V. A; Potapov, A. P; Artyomov, M. Yu; Fokin, A. V
Physics of the solid state, 05/2021, Letnik: 63, Številka: 5Journal Article
EPR spectra of impurity ions of Mn.sup.2+ (S = 5/2), Gd.sup.3+ (S = 7/2), and Cu.sup.2+ (S = 1/2) were found and investigated in addition to the intensive signals of axial centers of Cr.sup.4+ in the Li.sub.2CaSiO.sub.4 crystal. Manganese and gadolinium ions show spectra of tetragonal symmetry; copper ions show both spectra of axial and triclinic symmetry. Parameters of the spin Hamiltonians for the tetragonal centers were determined. Ions of Mn.sup.2+ and Gd.sup.3+ were shown to replace calcium ions with octahedral oxygen environment; copper ions are localized on lithium positions having tetrahedral environment. The reasons for appearing of triclinic Cu.sup.2+ centers are discussed.
