Record details

    New insight into the origin of anomalous magnetism of titanohematite lamellae in rhombohedral oxide assemblages -consequence for Mars magnetism
    Adachi, T.
    Heřmánek, M.
    Kletetschka, Günther
    Mikula, V.
    Wasilewski, P. J.
    Zbořil, R.
    American Geophysical Union ; Joint Assembly (22.05.2007-25.05.2007 : Acapulco, Mexiko)
Publication type
Source title - monograph
    EOS, Transactions, American Geophysical Union
    Roč. 88, č. 23 (2007), GP33A-07
    Překlad názvu: Nový náhled do původu anomalní magnetizace titanohematitovych lamel ve rhombohedrálních uspořádáních
    Rozsah: 2 s. : WWW
    Výzkumný záměr: CEZ:AV0Z30130516
Subject category
    magnetic anomalies
Abstract (in english)
   In an attempt to explain the origin of such strong magnetization in titanohematite bearing rocks, two hypotheses have been proposed. We evaluate these two hypotheses in light of temperature dependent Mossbauer spectra and magnetic measurements. Resulting measurements determine that strong magnetization of titanohematite is due to large canting angle (32 degree from the anti-parallel arrangement) causing ferromagnetic contribution of the titanohematite to the overall magnetization. We also show that the smallest titanohematite lamellae demonstrate blocking temperature near 300C and do not enhance but diminish the overall remanent magnetization.
    AV ČR Brno, Geologický ústav
Contributor code
    AV ČR, GLÚ
Source format
Import date
    8. 8. 2012