Mössbauer study and magnetic measurement of troilite extract from Nantan iron meteorite

0383519 - GLÚ 2013 RIV US eng C - Conference Paper (international conference)
Čuda, J. - Kohout, Tomáš - Tuček, J. - Filip, J. - Medřík, I. - Mashlan, M. - Zbořil, R.
Mössbauer study and magnetic measurement of troilite extract from Nantan iron meteorite.
Mössbauer spectroscopy in materials science - 2012 : proceedings of the International Conference MSMS-12, Olomouc, Czech Republic, 11-15 June 2012. Melville: American Institute of Physics, 2012 - (Tuček, J.; Machala, L.), s. 145-153. AIP Conference Proceedings. ISBN 978-0-7354-1101-2. ISSN 0094-243X.
[Mössbauer Spectroscopy in Materials Science /10./. Olomouc (CZ), 11.06.2012-15.06.2012]
R&D Projects: GA AV ČR(CZ) KJB300130903
Institutional research plan: CEZ:AV0Z30130516
Keywords : troilite * zero- and in-field Mössbauer spectroscopy * magnetization measurements * Natan IIICD iron meteorite
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

We focused on the troilite in-field Mössbauer spectrum at 5 K in order to confirm or rule out the interpretation of two sextets for other troilite system extracted from the Natan IIICD iron meteorite. Beside the Mössbauer spectroscopy investigation, the global magnetic response of troilite extract was measured. Detailed analysis of field-cooled (FC) induced magnetization (10 mT) showed a similar profile to daubreelite (FeCr2S4) at temperatures below170 K. Induced-FC, temperature dependence of remanent magnetization, and room temperature saturation isothermal remanent magnetization (RT SIRM) magnetization do not show any significant change at low temperatures (70 K) related to prior magnetic studies for troilite. In order to quantify a magnetic response of the troilite extract from the Nantan IIICD iron meteorite, the hysteresis loops at 5 and 300 K were measured in external magnetic fields up to 7 T. Hysteresis parameters of coercive field (BC) and saturation magnetization (MS) were found to be 56 mT and 2 Am2/kg at 5 K, respectively. At room temperature, the values of these parameters are lower (BC 14 mT and MS 1.44 Am2/kg).
Permanent Link: http://hdl.handle.net/11104/0213429