FePd melt-spun ribbons and nanowires: Fabrication and magneto-structural properties |
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Authors: | VM Prida V Vega JL Sánchez Llamazares JD Santos JJ Suñol |
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Institution: | a Departamento Física, Universidad de Oviedo, Calvo Sotelo s/n, 33007 Oviedo, Asturias, Spain b Departamento Física Materia Condensada, ICMSE-CSIC, Universidad de Sevilla, 41080 Sevilla, Spain c Universidad de Girona, Campus Montilivi, Lluís Santaló s/n, 17003 Girona, Spain |
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Abstract: | Fe-30%Pd alloys in ribbon and nanowire geometry have been prepared. Ribbon samples were produced by the melt-spinning technique in the Ar environment. FePd nanowires, having about 35 nm in diameter, 105 nm inter-nanowires distance and around 4 μm in length, were synthesized into nanoporous anodic alumina membranes as templates. Energy dispersive X-ray microanalysis of ribbons shows an average atomic composition of Fe (73.2%) and Pd (26.8%). The X-ray diffraction at RT analysis was performed on both surfaces, free and wheel side, of the melt-spun ribbon. It shows the coexistence of two phases: fct and bct FePd, but with differences between both surfaces consisting the existence of Fe oxides (Fe2O3 and Fe3O4) and a textured 200 reflection in the free side. Heating and cooling thermomagnetic curves exhibit a reversible behaviour from RT to 720 K, but around 770 K a clear irreversible transformation takes place. |
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Keywords: | Iron-palladium alloys Melt-spun ribbons Phase transformation Magnetic nanowires |
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