Magnetic and Structural Properties of Fe-Based Nanoparticles |
| O. Milkovica, b, c, M. Cesnekd, J. Gamcovaa, b, T. Kmjece, J. Kohoute, M. Reiffersf, R. Vargag
aInstitute of Material Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic bInstitute of Materials and Quality Engineering, Faculty of Materials, Metallurgy and Recycling, Technical University of Košice, Letná 9, 042 00 Košice, Slovak Republic cInstitute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic dDepartment of Nuclear Reactors, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, V Holešovičkách 2, 180 00 Prague 8, Czech Republic eFaculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Prague, Czech Republic fFaculty of Humanities and Natural Sciences, Prešov University, Prešov, Slovak Republic gCPM-TIP, P.J. Šafárik University, Park Angelinum 9, Košice, 041 54, Slovakia |
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| In this study, nanoparticles were prepared by precipitation from solid solution of saturated binary Cu-Fe alloy with subsequent electrochemical dissolution of the surrounding matrix. As-prepared nanoparticles were studied by the Mössbauer spectroscopy and scanning transmission electron microscopy. Results show that the as-prepared nanoparticles have core-shell character and their mean size is dependent on annealing time. The Mössbauer spectroscopy revealed major crystalline phase which was identified as α-Fe and relatively disordered minor phase which was identified as maghemite (γ-Fe2O3). Magnetic measurements suggest that saturated magnetization is not only dependent on core diameter of nanoparticles but also on its structure. |
DOI:10.12693/APhysPolA.137.723 topics: Fe-based nanoparticles, magnetization, Mössbauer spectroscopy |