Cobalt–titanium multilayer thin films: Effect of thickness of titanium spacer layer on impedance properties

Swift heavy ions induced structural and magnetic modifications of Co/Ti multilayers have been studied with 120 MeV Ag9+ ions at different ion fluences. The decrease in 1st Bragg peak intensity of X-ray reflectivity spectra confirms an increase in Co-Ti mixing at the interfaces, whereas X-ray diffraction (XRD) measurements reveal amorphization of the crystalline Co layer. XRD also indicates a shift in peak position towards a lower angle, confirming the development of tensile stress upon irradiation whereas an increase in the peak width suggests the reduction in the grain size. Vibrating sample magnetometer measurements show a reduction in Mr/Ms due to Co-Ti interface mixing and formed bcc-Co3Ti metastable phase. The X-ray absorption fine structure (XAFS) technique has been utilized to obtain variation in Co-Co and Co-Ti bond distances as a function of ion fluences. Quantitative estimation of Co3Ti phase generated due to ion irradiation has also been obtained using Co K-edge XAFS fitting.

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Phase transformation of [Co/Ti]x10 multilayer under swift heavy ion irradiation

Rajput

Kumar

Biswas

et al. 2017

Journal of Applied Physics

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Cobalt–titanium multilayer thin films: Effect of thickness of titanium spacer layer on impedance properties

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Phase transformation of [Co/Ti]x10 multilayer under swift heavy ion irradiation

Phase transformation of [Co/Ti]x10 multilayer under swift heavy ion irradiation

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