Daubreelite and troilite as a source of cometary and minor body magnetism in cold environment

0090678 - GLÚ 2008 US eng A - Abstrakt
Kohout, Tomáš - Kosterov, A. - Jackson, M. - Pesonen, L. J. - Kletetschka, Günther - Lehtinen, M.
Daubreelite and troilite as a source of cometary and minor body magnetism in cold environment.
[Daubrelit a troilit jako nízkoteplotní nositel magnetizace komet a malých těles Sluneční soustavy.]
Meteoritics & Planetary Science. Wiley. Roč. 42, Supplement (2007), s. 5209-5209. ISSN 1086-9379. E-ISSN 1945-5100.
[Annual Meteoritical Society Meeting /70./. 13.08.2007-17.08.2007, Tucson]
Výzkumný záměr: CEZ:AV0Z30130516
Klíčová slova: daubreelite * troilite * magnetism
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika

Various FeNi phases (kamacite, taenite, tetrataenite) are dominant magnetic phases in most chondritic meteorites. In addition, iron-bearing sulphides are detected in meteorites as well as in cometary dust. At room temperature daubreelite is paramagnetic and troilite is antiferromagnetic, thus not contributing to remanent nor induced magnetizations. However, at low temperatures magnetic transitions occur enhancing significantly their magnetic properties. The magnetization and susceptibility of iron bearing sulphides, especially daubreelite, is significantly increased in low temperature range. Those minerals can contribute to or even control magnetic properties of bodies in the cold regions of our Solar System. The thermal conditions of the objects in the main asteroid belt are probably above those temperatures.
Trvalý link: http://hdl.handle.net/11104/0151492