The possibility of self-reversal of chemical remanent magnetization CRM is studied on synthetic samples of titanomagnetites Fe 3-x Ti x O 4, where x = 0.2, 0.4, and 0.6 that experienced multiphase oxidation in air at 500o C in the presence of the constant magnetic field H = 0.1nbsp;mT. The self-reversal was fixed in accordance with anomalous behavior of CRM curves of cooling in H = 0 and heating in H = 0. Complete self-reversal of CRM is discovered experimentally in samples of oxidized titanomagnetites with initial x = 0.6, while partial self-reversal is revealed in other titanomagnetite compositions. Superposition of a partial thermoremanent magnetization pTRM on CRM showed that heating curves of CRM+pTRM are also anomalous, but negative values of the total magnetization are not observed.
titanomagnetite, oxidation, magnetization, self-reversal.
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