Crystal Growth in the System FeO-MgO-Fe₂O₃

Abstract

Well-characterized single crystals of the double-oxide magnetic ferrites are of considerable interest to investigators concerned with the basic properties of these materials—particularly since they permit studies of the influence of possible cationic arrangements on magnetic characteristics. As a result, much effort has been devoted to obtaining reasonably large, pure crystals of these materials, primarily by the use of fusion techniques. Although frequent claims have been made for the growth of single crystals, unfortunately, except for a few compounds, careful examination reveals the presence of two phases, excessive ferrous iron contents, or both. The lack of phase-diagram information at the liquidus for the systems of interest reduces single-crystal growth attempts to an almost empirical approach.

This work was supported by the U.S. Navy Office of Naval Research. Reproduction in whole or in part is permitted for any purpose of the United States Government.