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On the origin of discontinuity of the hyperfine fields at Fe nuclei in bulk iron and aerosol Fe nanoparticles |
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| Authors: | YuI PetrovEA Shafranovsky Ll CasasE Molins |
| Institution: | a Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygin str. 4, 119991, GSP-1, Moscow, Russia b Departament de Geologia, Universitat Autònoma de Barcelona, Edifici C, Campus de la UAB, 08193 Bellaterra, Spain c Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Spain |
| Abstract: | Advancing the early work in which a discontinuity of hyperfine fields at 57Fe nuclei in bulk iron and in aerosol Fe nanoparticles has been revealed by analyzing their Mössbauer spectra the present Letter evidences that the existence of several peaks in the hyperfine distribution (HFD) for bulk Fe is caused with the internal magnetic fields owing to its multidomain structure whereas aerosol Fe nanoparticles are single-domain and show only a unique peak in HFD. This argument has been corroborated by transformation of the HFD pattern for Fe foil after applying the external magnetic field of 0.03 T. |
| Keywords: | Hyperfine field distribution Iron Aerosol nanoparticles Domain structure Mö ssbauer spectroscopy |
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