Optical and magnetic properties of some transition metal ions in lithium phosphate glass

Abstract

In lithium phosphate glass doped with first row transition metal ions it appears that the various transition metal ions possess normal oxidation states; Cr 3+, Mn 3+, Fe 2+ and Fe 3+, Co 2+, Ni 2+ and Cu 2+. The room temperature and 77°K spectra for Cr 3+, Mn 3+, Fe 2+.3+, Ni 2+ and Cu 2− containing glasses can be interpreted on the basis of octahedrally coordinated metal ions, while the spectrum of the Co 2+ glass correlates with a tetrahedrally coordinated metal ion. The magnetic moments for the Mn 3+, Fe 2+.3+, Co 2+, Ni 2+ and Cu 2+ are all of the order of the spin only values. The magnetic moment for the Cr 3+ containing glass is somewhat lower than the spin only value.