Sharmistha, B. and Shahid, A. and Lalla, N.P. (2009) Effect of swift heavy ion irradiation in Fe/W multilayer structures. Applied Surface Science, 256 (2). pp. 541-546. ISSN 0169-4332

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Present study reports effect of swift heavy ion irradiation on structural and magnetic properties of sputtered Fe/W multilayer structures (MLS) having bilayer compositions of [Fe(20A˚ )/W(10A˚ )]5BL and [Fe(20A˚ )/W(30A˚ )]5BL. These MLS are irradiated by 120 MeV Au9+ ions up to fluence of 4 1013 ions/cm2. X-ray reflectivity (XRR), wide-angle X-ray diffraction (WAXD), cross-sectional transmission electron microscopy (X-TEM) and magneto optical Kerr effect (MOKE) techniques are used for structural and magnetic characterization of pristine and irradiated MLS. Analysis of XRR data using Parratt’s formalism shows a significant increase in W/Fe interface roughness. WAXD and X-TEM studies reveals that intralayer microstructure of Fe-layers in MLS becomes nano-crystalline on irradiation. MOKE study shows increase in coercivity at higher fluence, which may be due to increase in surface and interface roughness after recrystallization of Fe-layers.

Item Type: Article
Uncontrolled Keywords: Fe/W MLS; Swift heavy ion irradiation; X-TEM; WAXD; Magnetic measurement
Subjects: Electrochemical Materials Science
Depositing User: TTBD CECRI
Date Deposited: 01 Apr 2012 11:43
Last Modified: 01 Apr 2012 11:43

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