Abstract
A review is provided concerning the thermodynamic and electrical characteristics of nonstoichiometric magnetite, Fe3(1-δ)O4. Great stress is placed on the need for careful preparation and appropriate annealing of single crystal specimens. Information needed to prepare material of a given δ value is provided. For δ≤0·0039 magnetite undergoes a first-order phase change at the Verwey transition; for δ>0·0039 the change is of second or higher order. Corresponding types of changes are encountered in resistivity and Seebeck coefficient measurements. Some aspects of the Verwey transition are discussed.
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Honig, J.M. The synthesis, crystal growth, and characterization of nonstoichiometric magnetite. Proc. Indian Acad. Sci. (Chem. Sci.) 96, 391–409 (1986). https://doi.org/10.1007/BF02936294
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DOI: https://doi.org/10.1007/BF02936294