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

AuthorsGich, Martí ; Roig Serra, Anna ; Casas Duocastella, Lluís; Molins, Elies
KeywordsIron alloys
Chromium alloys
Magnetic particles
Issue Date19-Jul-2005
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 98(2): 024303 (2005)
AbstractThe 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.
Description8 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.
Publisher version (URL)http://dx.doi.org/10.1063/1.1946907
Appears in Collections:(ICMAB) Artículos
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