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dc.contributor.author | Bezaeva N. | |
dc.contributor.author | Chareev D. | |
dc.contributor.author | Rochette P. | |
dc.contributor.author | Kars M. | |
dc.contributor.author | Gattacceca J. | |
dc.contributor.author | Feinberg J. | |
dc.contributor.author | Sadykov R. | |
dc.contributor.author | Kuzina D. | |
dc.contributor.author | Axenov S. | |
dc.date.accessioned | 2018-09-19T22:05:23Z | |
dc.date.available | 2018-09-19T22:05:23Z | |
dc.date.issued | 2016 | |
dc.identifier.issn | 0031-9201 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/144676 | |
dc.description.abstract | © 2016 Elsevier B.V..Here we present a comprehensive magnetic characterization of synthesized non-ideal single-domain (SD) monoclinic pyrrhotite (Fe7S8). The samples were in the form of a powder and a powder dispersed in epoxy. "Non-ideal" refers to a powder fraction of predominantly SD size with a minor contribution of small pseudo-single-domain grains; such non-ideal SD pyrrhotite was found to be a remanence carrier in several types of meteorites (carbonaceous chondrites, SNC. . .), which justifies the usage of synthetic compositions as analogous to natural samples. Data were collected from 5 to 633 K and include low-field magnetic susceptibility (χ0), thermomagnetic curves, major hysteresis loops, back-field remanence demagnetization curves, first-order reversal curves (FORCs), alternating field and pressure demagnetization of saturation isothermal remanent magnetization (SIRM), low temperature data (such as zero-field-cooled and field-cooled remanence datasets together with room temperature SIRM cooling-warming cycles) as well as XRD and Mössbauer spectra. The characteristic Besnus transition is observed at ∼33 K. FORC diagrams indicate interacting SD grains. The application of hydrostatic pressure up to 2 GPa using nonmagnetic high-pressure cells resulted in the demagnetization of the sample by 32-38%. Repeated cycling from 1.8 GPa to atmospheric pressure and back resulted in a total remanence decrease of 44% (after 3 cycles). Pressure demagnetization experiments have important implications for meteorite paleomagnetism and suggest that some published paleointensities of meteorites with non-ideal SD monoclinic pyrrhotite as remanence carrier may be lower limits because shock demagnetization was not accounted for. | |
dc.relation.ispartofseries | Physics of the Earth and Planetary Interiors | |
dc.subject | Magnetic properties | |
dc.subject | Non-ideal single-domain monoclinic pyrrhotite | |
dc.subject | Pressure demagnetization | |
dc.title | Magnetic characterization of non-ideal single-domain monoclinic pyrrhotite and its demagnetization under hydrostatic pressure up to 2 GPa with implications for impact demagnetization | |
dc.type | Article | |
dc.relation.ispartofseries-volume | 257 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 79 | |
dc.source.id | SCOPUS00319201-2016-257-SID84971654665 |