The effects of Ti substitution for Fe on octahedral sites in magnetite has been investigated through electrical resistivity measurements. In a manner analogous to zinc ferrites, the Verwey transition temperature is depressed with increasing Ti content. The Verwey transition is of first order in Fe3~Ti~04 in the concentration range O~y~y, =0. 012; for y, y 3y, the transition is of second order, and for y) 3y, the phase transformation is completely eliminated. The data are correlated with comparable work on dilute zinc ferrites and nonstoichiometric magnetite, and the implications of the findings are discussed.

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Magnetization measurements have been carried out for Fe3−xTixO4 single crystals in the range 0≤x<1. The calculated cubic K1 anisotropy constant passes through a minimum at x≊0.2 and rises abruptly for larger x. This behavior can be correlated with progressive increase in Fe2+ occupancy of the tetrahedral interstices for x≳0.2.

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