Effect of swift heavy ions in Ni-Al nanocrystalline films studies by x-ray absorption spectroscopy

doi:10.1016/j.saa.2007.11.031

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Title:	Effect of swift heavy ions in Ni-Al nanocrystalline films studies by x-ray absorption spectroscopy
Authors:	Asokan, K.;Tsai, H.-M.;Bao, C.-W.;Chiou, J.-W.;Pong, W.-F.;Sonia, G.;Anand, T.-J.-S.
Contributors:	淡江大學物理學系
Keywords:	XANES;Intermetallic alloys;Ni–Al alloys;Swift heavy ions
Date:	2008-07
Issue Date:	2011-10-24 10:36:57 (UTC+8)
Publisher:	Elsevier BV
Abstract:	X-ray absorption spectroscopic measurements have been used to compare the electronic structures of swift heavy ions (100 MeV Si ions) irradiated and pristine Ni–Al nanocrystalline films. Results from X-ray diffraction (XRD), X-ray absorption near-edge structure (XANES) spectra at Al K-, and Ni L2,3-edges and extended X-ray absorption fine structure (EXAFS) at Ni K-edges are discussed. The observed XRD peaks indicate the improvement of crystalline nature and Al(1 1 1) clustering after the swift heavy ion interactions. While the XANES spectra at Ni L2,3-edges show decrease in the intensity of white line strength, the Al K-edge shows increase in intensity after irradiation. Above results imply that swift heavy ions induce low Z (i.e., Al) ion mass transport, changes in Al sp-Ni–d hybridization, and charge transfer. EXAFS results show that crystalline nature is improved after swift heavy irradiation which is consistent with XRD results.
Relation:	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pages 70(2), pp.454–457
DOI:	10.1016/j.saa.2007.11.031
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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