Local Atomic and Electronic Structure of the Fe dopants in AlN:Fe Nanorods

Abstract

Local Atomic and Electronic Structure of the Fe dopants in AlN:Fe Nanorods

V.L. Mazalova, O.E. Polozhentsev,A.A. Dorosheva, D.S. Chub, A.P. Chaynikov, A.L. Bugaev, M.A. Soldatov, A.A. Guda, G.A. Khaishbashev

Incoming article date: 17.11.2013

Fe-doped AlN nanorods were studied by means of x-ray absorption spectroscopy above the Fe K- and L2,3- edges. Theoretical simulations of the x-ray absorption spectra show that Fe atoms mainly substitute Al. A minor fraction of Fe interstitials or Fe-Al-N ternary alloy can be identified as well. Bader’s AIM analysis predicts that neutral substitutional FeAl defect is in 2+ charge state, though Al in pure AlN is in 3+ charge state.  Fe L2,3 absorption spectra and photoluminescence data indicate the coexistence of Fe2+/Fe3+ in AlN:Fe nanorods so different charge states of substitutional FeAl should co-exist.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production