Interaction of Manganese Activator Ions in Zinc-Orthosilicate Phosphors

Abstract

A study was made of specially prepared rhombohedral ${\mathrm{Zn}}_2$Si${\mathrm{O}}_4$: Mn phosphors, utilizing magnetic, chemical, and luminescence techniques. From measurements of Weiss constants, it is shown that magnetic interaction occurs between manganese activator ions. The magnetic interaction increases with increasing proportion of manganese in the range where the following related luminescence characteristics decrease: (1) efficiency, (2) temperature break-point, and (3) decay time.