Abstract

A newly developed etchant is proposed for revealing dislocations on the (100) surface of MgO. The reliability and usefulness of this etchant have been established by the matching of pits on the separated faces of a cleaved crystal and by the pit arrays obtained by etching of a plastically deformed crystal. The size and shape of etch pits are temperature- as well as concentration- dependent. With increasing concentration of the etchant, the etch pits changed their shape from square with the edges oriented in the 〈110〉 directions, to circular.

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