Della Noce, R. [UNESP]Benedetti, Assis Vicente [UNESP]Magnani, M. [UNESP]Passamani, E. C.Kumar, H.Cornejo, D. R.Ospina, C. A.2015-03-182015-03-182014-10-25Journal Of Alloys And Compounds. Lausanne: Elsevier Science Sa, v. 611, p. 243-248, 2014.0925-8388http://hdl.handle.net/11449/116588Structural, morphological and magnetic characterization of electrodeposited Co-Fe-W alloys, containing small amounts of W(up to 9 at.%), were performed using X-ray diffractometry, scanning (SEM) and transmission (TEM) electron microscopy, Mossbauer spectroscopy and magnetization measurements. Electrodeposited (Co-100 Fe-x(x))(100) W-y(y) films (x = 63-72 at.% Fe, y = 4-9 at.% W) were successfully produced varying the applied cathodic current density (i(c)) between 0.5 and 10 mA cm (2). X-ray diffraction results revealed a bcc-like structure for all studied compositions with average crystallite size ranging from 16 to 35 nm, as also confirmed by TEM results. SEM images indicated that needle-type morphology is dominant for the deposits containing lower W content (up to 4.5 at.%.), while a cauliflower-type behavior is observed for higher W content deposits. Room temperature M ssbauer spectra indicate the presence of two magnetic species for all samples; one component associated with an ordered Co-Fe-W fraction (crystalline grain core) and a magnetic disordered Co-Fe-W contribution, which can be attributed to the grain boundaries/grain surfaces. Magnetization was observed to be in the film plane along the film direction, except the sample prepared at i(c) = 10 mA cm (2) that is slightly canted from in-to out-of-plane geometry. Magnetic measurements show high saturation magnetization values accompanied by low coercivity ones for the electrodeposited Co-Fe-W alloys, making these alloys potential materials for applications in magnetic devices such as read/write heads and hard disks. (C) 2014 Elsevier B.V. All rights reserved.243-248engCo-Fe-W alloysElectrodepositionMossbauer spectroscopyX-ray diffractometryArtigo10.1016/j.jallcom.2014.05.157WOS:000338932400038Acesso restrito