Abstract
A novel method for the synthesis of nanostructured films produced by depositing gas-phasemagnetic nanoparticles is presented and the properties of the films are reported. Thetechnique mixes metal vapour and small argon clusters produced in a supersonicexpansion. The condensed clusters are subsequently deposited in situ onto coppergrids. The cluster size is controlled by the vapour pressure of the metal insidethe pick-up chamber. Detailed analysis of the transmission electron micrographsof the Fe clusters shows that there is a simple linear relationship between theaverage metal cluster diameter and the metal vapour pressure during deposition.Furthermore, the nanoparticles show a relatively narrow size distribution for a given setof experimental conditions. Structural and magnetic investigations have beenperformed on Fe cluster samples, and the influence of the metal vapour pressure hasbeen studied. Detailed analysis of the magnetic and structural data has beenperformed and valuable information such as cluster size distributions, strength of theinterparticle dipolar interactions and average magnetic moment per cluster are derived.It is shown that, at room temperature, the magnetic behaviour of the films isconsistent with nanoparticle supermoments interacting via dipolar interactions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
