Characterization of defects in nickel-doped MgO crystals

Abstract

Heavily Ni‐doped magnesium oxide crystals, grown by the arc‐fusion technique, have been investigated using optical and transmission electron microscopy to examine the dislocation content, sub‐boundaries, and impurity precipitates. Yield stress measurements were also made. Dislocation structures and impurity precipitates at the sub‐boundaries are described, and their implications concerning the use of these crystals as laser materials are discussed.