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Título

Aerosol nanoparticles in the Fe1–xCrx system: Room-temperature stabilization of the phase and -phase transformation

AutorGich García, Martí; Roig, Anna; Casas Duocastella, Lluís; Molins Grau, Elíes
Palabras claveIron alloys
Chromium alloys
Aerosols
Nanoparticles
Magnetic particles
Fecha de publicación19-jul-2005
EditorAmerican Institute of Physics
CitaciónJournal of Applied Physics 98(2): 024303 (2005)
ResumenThe production and structural characterization of gas-evaporated nanoparticles in the Fe1–xCrx system, with 0<x<0.83 are reported. The results show that for x~0.5 the metastable -FeCr can be stabilized and it constitutes up 60 wt % of the material. The sample with the highest -FeCr content is further analyzed to study the structural and the magnetic properties of this phase and its thermal stability. The -FeCr phase is weakly magnetic with an average magnetic moment of 0.1µB per Fe atom and a Curie temperature below ~60 K. It is stable up to 550 K where it starts to transform to bcc-FeCr. Annealing at 700 K yields Cr2O3 due to Cr surface segregation and affects the magnetic behavior of the system, which is dominated by interparticle interactions.
Descripción8 pages, 12 figures, 1 table.-- PACS: 75.50.Tt; 75.30.Kz; 82.70.Rr; 75.30.Cr; 68.35.Dv; 81.40.Gh.-- et al.
Versión del editorhttp://dx.doi.org/10.1063/1.1946907
URIhttp://hdl.handle.net/10261/21693
DOI10.1063/1.1946907
ISSN0021-8979
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