Kurt, M. S.Baker, S. H.Roy, M.Lees, M. R.2026-03-262026-03-2620190304-88531873-476610.1016/j.jmmm.2018.08.0402-s2.0-85054598408https://doi.org/10.1016/j.jmmm.2018.08.040https://hdl.handle.net/20.500.14901/2309Lees, Martin R/0000-0002-2270-2295; Kurt, Mustafa Şükrü/0000-0002-2639-1850We describe the atomic structure and magnetism in Fe nanoparticles (similar to 2 nm) ebedded in a Cu1-xAlx alloy matrix. Nanocomposite films for these studies were prepared directly from gas phase using a flexible co-deposition technique under Ultra-High Vacuum (UHV) conditions. Fe nanoparticles and the alloy matrix were prepared using a gas aggregation source and MBE sources respectively. Extended x-ray absorption fine structure (EXAFS) experiments indicate that the embedded Fe nanoparticles retain a bcc structure for Al-contents greater than x = 0.13 but, for Al-contents lower than this value, Fe nanoparticles have both fcc and bcc structures. The magnetic moment per Fe atom initially increases with increasing Al-content due to the bcc structure becoming more dominant in the embedded nanoparticles as the Al-content is increased, but then decreases with further increase in Al-content. This decrease is consistent with a modest degree of alloying between Fe and Al atoms at the particle/matrix interfaces.eninfo:eu-repo/semantics/openAccessFe NanoparticlesMagneticAtomic StructureExafsArticle