Topotactical reactions with ferrimagnetic oxides having hexagonal crystal structures—II

A number of reactions between grains of non-oriented and magnetically oriented oxides of the system BaOMeOFe2O2 are described. Such conversions, for which the term “topotactical reaction” was introduced in a previous paper, can yield polycrystalline final products with oriented crystals. The reaction mechanism and the influence of sintering on the degree of orientation of the final product is studied for some topotactical reactions.