L1(0) structure formation in slow-cooled Fe-Au nanoclusters

TitleL1(0) structure formation in slow-cooled Fe-Au nanoclusters
Publication TypeJournal Article
Year of Publication2012
AuthorsMukherjee P, Zhang Y, Kramer MJ, Lewis LH, Shield JE
Journal TitleApplied Physics Letters
Volume100
Pages211911
Date Published05
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000304489900019
Keywordsco, films, nanoparticles, TRANSMISSION ELECTRON-MICROSCOPE
Abstract

An ordered L1(0) structure has been formed in near-stoichiometric Fe-Au alloy nanoparticles. The L1(0) structure with a = 0.367 nm and c = 0.360 nm was observed in nanoclusters with diameters below 10 nm after slow cooling from 600 degrees C. The stable L1(0) structure formed from a parent fcc solid solution phase observed in the as-formed clusters. The fcc phase has a lattice parameter of 0.417 nm, significantly expanded compared to both Au and gamma-Fe. The saturation magnetization and coercivity of both fcc and L1(0) structures were much lower than expected considering Fe dilution effects suggesting competing ferromagnetic and anti-ferromagnetic ordering. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4720180]

URL<Go to ISI>://WOS:000304489900019
DOI10.1063/1.4720180
Alternate JournalAppl. Phys. Lett.