Magnetic after-effects in Fe3O4and vacancy-doped magnetite
- 1 September 1980
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 42 (3) , 433-452
- https://doi.org/10.1080/01418638008221886
Abstract
The magnetic relaxation spectrum of stoichiometric and vacancy-doped magnetite has been investigated in the temperature range between 4·2 and 130 K. The observed relaxation processes are classified as short- and long-range rearrangements of Fe2+ and Fe3+ ionic states within domain walls. It is proposed that below 35 K a coherent tunnelling process governs the mobility of electrons, but that above 50 K is replaced by a thermally activated hopping process leading to the Verwey transition at 123 K.Keywords
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