First order magnetic transition, magnetic structure, and vacancy distribution in Fe2P
| Autor: | Bertil Carlsson, S. Devanarayanan, Roger Wäppling, Stig Rundqvist, Lennart Häggström, Tore Ericsson, Erik B. Karlsson |
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| Rok vydání: | 1975 |
| Předmět: |
Condensed matter physics
Magnetic moment Magnetic structure Chemistry Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials Inorganic Chemistry Condensed Matter::Materials Science Transition point Ferromagnetism Vacancy defect Materials Chemistry Ceramics and Composites Physical and Theoretical Chemistry Saturation (magnetic) Hyperfine structure |
| Zdroj: | Journal of Solid State Chemistry. 13:258-271 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/0022-4596(75)90128-0 |
| Popis: | The para- to ferromagnetic transition in Fe2P has been studied using Mossbauer spectroscopy. The magnetic hyperfine fields drop abruptly from about half of their saturation values to zero at 214.5 K indicating a first order transition. The isomer shifts show a discontinuous change at the transition point. For some samples the transition takes place over a wide temperature range, probably due to impurities and other imperfections in the samples. From the magnetic hyperfine fields at 15 K the magnetic moments can be deduced to be 1.14 μB and 1.78 μB for Fe(1) and Fe(2), respectively. An assignment of the components in the Mossbauer spectra to the two crystallographically nonequivalent iron positions has been made from the temperature variation of the spectra. The ordering of metal vacancies has been investigated by a Mossbauer study of a nonstoichiometric Fe2P sample and by an X-ray diffraction study of a nonstoichiometric Mn2P crystal. |
| Databáze: | OpenAIRE |
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