Details of the Electronic Relaxation in MnxFe3−xO4+γ

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Abstract
Magnetic loss angles of MnxFe3−xO4+γ(0≤x 1 at very low temperatures. In general, change in heat treatments introduces a significant change in the relaxations. The results are plotted on the relaxation time τ vs 1/T planes. Five different slow-relaxation mechanisms become apparent, of which three are related to electron transfer on Fe3+ ions, one to electron transfer on Mn2+ and Mn4+ ions and the last one to the reorientational effect of the Jahn-Teller distortion of Mn3+ ions. Observation of the relaxation in magnetostriction at 78°K was performed for the specimens with x∼1, but no effect was observed within an accuracy of 3 × 10−7.

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