Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46977 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Self-reversal of chemical remanent magnetization during multiphase oxidation of synthetic titanomagnetites Self-reversal of chemical remanent magnetization during multiphase oxidation of synthetic titanomagnetites Gapeev A K Gapeev A K Gribov S K Gribov S K Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Borok, Yaroslavl oblast, Russia ru Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Borok, Yaroslavl oblast, Russia ru Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Borok, Yaroslavl oblast, Russia ru Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Borok, Yaroslavl oblast, Russia ru 10 6 1 8 10 11 2021 https://rjes.ru/en/nauka/article/46977/view

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.

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. titanomagnetite oxidation magnetization self-reversal.

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