Copper defects inside AlN:Cu nanorods – XANES and LAPW study

doi:10.1088/1742-6596/190/1/012136

Copper defects inside AlN:Cu nanorods – XANES and LAPW study

A A Guda et al 2009 J. Phys.: Conf. Ser. 190 012136 (4pp) doi: 10.1088/1742-6596/190/1/012136

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A A Guda¹, S P Lau², M A Soldatov¹, N Yu Smolentsev¹, V L Mazalova¹, X H Ji³ and A V Soldatov¹
¹ Southern Federal University, Zorge 5, Rostov-on-Don, 344090 Russia
² Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong (P.R. China)
³ Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, South China University of Technology, Ministry of Education, Guang zhou 510640, China
E-mail: guda_sasha@mail.ru

Abstract. AlN ferromagnetic nanorods with 5 at.% of copper were studied by using x-ray absorption spectroscopy (XAFS) above the Cu K- and L3- edges. Theoretical simulations of XAFS spectra clearly identify a formation of small copper clusters inside AlN lattice. Average size of clusters was estimated to be 50–70 atoms from the analysis of both XANES (X-ray Absorption Near Edge Spectroscopy) and EXAFS (Extended X-ray Absorption Fine Structure) regions of spectra. Calculations of magnetic moments for different types of point copper defects in AlN lattice were made.

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Copper defects inside AlN:Cu nanorods – XANES and LAPW study

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