UHV evaporated Fe65Ni35 multilayers were irradiated with 200 keV Kr ions at doses in the range 1 x 10(15)-5 x 10(16) ions/cm2 in order to follow the mixing process as a function of the fluence. The samples were analysed by XRD (glancing angle), RBS and CEMS techniques. Both XRD patterns and CEM spectra show that a partial bcc to fcc phase transformation occurs even at the lowest irradiation dose and goes on when the irradiation dose is increased. A remarkable enhancement of the fcc lattice parameter, due to interstitial inclusions of Kr atoms occurs at 4 x 10(16) Kr2+/cm2 dose. At this dose the analysis of the CEM spectrum exhibits an important component, attributed to the Invar phase, and a vanishing central nonmagnetic component, due to fcc iron rich alloy.
MIXING EFFECT OF FE/NI MULTILAYERS OF OVERALL FE65NI35 COMPOSITION / Tosello, C; Ferrari, F; Brand, R; Keune, W; Marest, G; Elkhakani, Ma; Parellada, J; Principi, G; Lorusso, S; Rigato, V; Enzo, Stefano. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION B, BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - ISSN 0168-583X. - 80-1:(1993), pp. 417-420. [10.1016/0168-583X(93)96152-3]
MIXING EFFECT OF FE/NI MULTILAYERS OF OVERALL FE65NI35 COMPOSITION
ENZO, Stefano
1993-01-01
Abstract
UHV evaporated Fe65Ni35 multilayers were irradiated with 200 keV Kr ions at doses in the range 1 x 10(15)-5 x 10(16) ions/cm2 in order to follow the mixing process as a function of the fluence. The samples were analysed by XRD (glancing angle), RBS and CEMS techniques. Both XRD patterns and CEM spectra show that a partial bcc to fcc phase transformation occurs even at the lowest irradiation dose and goes on when the irradiation dose is increased. A remarkable enhancement of the fcc lattice parameter, due to interstitial inclusions of Kr atoms occurs at 4 x 10(16) Kr2+/cm2 dose. At this dose the analysis of the CEM spectrum exhibits an important component, attributed to the Invar phase, and a vanishing central nonmagnetic component, due to fcc iron rich alloy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
