The BCC to FCC/HCP phase transformation of the Co70Fe30 alloy produced by ion irradiation of Co70Fe30/Cu discontinuous multilayers期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

The BCC to FCC/HCP phase transformation of the Co₇₀Fe₃₀ alloy produced by ion irradiation of Co₇₀Fe₃₀/Cu discontinuous multilayers

Authors:	I. L. Graff W. H. Flores M. C. M. Alves L. Amaral S. R. Teixeira

Affiliation:	^a Instituto de Física, Universidade Federal do Rio Grande—UFRGS, C.P. 15051, 91501-970, Porto Alegre, Brazil ^b LNLS—Laboratório Nacional de Luz Síncrotron, C.P. 6192, 13081-970, Campinas, Brazil

Abstract:	We report on the BCC to FCC/HCP structural transformation of Co₇₀Fe₃₀ alloy produced by room temperature ion irradiation of Co₇₀Fe₃₀/Cu discontinuous multilayers. The structural changes were analyzed by X-ray diffraction and X-ray absorption spectroscopy. For this study, two different samples were examined, one irradiated with 50 keV He⁺ and another with 600 keV Kr⁺ with doses of 1×10¹⁷ and 3×10¹⁵ ions/cm², respectively. No substantial change is observed after He⁺ irradiation, while after Kr⁺ irradiation an unexpected structural transition from BCC to FCC/HCP closed packed of the Co₇₀Fe₃₀ alloy was found.

Keywords:	Metallic multilayers Ion irradiation X-ray absorption
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