Abstract
Fe-N clusters were prepared by a plasma-gas-condensation cluster deposition apparatus at various nitrogen gas flow rate R N2 , and their crystal structures wre investigat by transmission electron microscopy. For RN 2 > 2.2 × 10 -7 mol/s, fcc single-phase FeN clusters are obtained and their lattice parameter is a = 0.428 nm, being close to that (a = 0.433 nm) of ZnS-type FeN films. When R N2 ≥ 7.5 x 10 -7 mol/s, almost all clusters are of a tetrah n shape with cluster sizes of d = 8-25 nm. This reveals that the tetrahedron shape of FeN compound clusters is stable in such small sizes, implying a low (111) surface energy and/or high elastic strain energy and twin boundary energy compared with pure metal clusters with fcc structure.
Sign-in/Register to access full text options 
Free) 
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 call
