Analysis of electronic, magnetic and half-metallic properties of L21-type (Co2Mn0.5Fe0.5Sn) Heusler alloy nanowires synthesized by AC-electrodeposition in AAO templates

Abstract

In order to investigate the structural, magnetic and electric properties, Co-based Co2Mn0.5Fe0.5Sn full Heusler compound nanowires were synthesized for the first time using alternating current (AC) deposition in anodized alumina oxide (AAO) templates. The half-metallicity, band gap and 100% spin polarization was also confirmed using the art of full potential linearized augmented plane wave methods (FP-LAPW) within density functional theory (DFT). The SEM images have confirmed the average diameter of templates and nanowires 62 nm and 58 nm respectively. The XRD confirms the formation of full Heusler alloy, L21 (A2 & B2 type disorder) type crystal structure. Energy dispersive X-ray spectroscopy (EDX) technique shows Tin (Sn) decreases whereas (Co, Fe & Mn) almost increases with increase in deposition potential. The M−H loops show the variation of coercivity and saturation magnetization with respect to deposition potential. Two probe I-V curves show that resistance decreases w.r.t deposition voltage. The resistivity and carrier concentration were decreased in a similar fashion w.r.t increased in deposition voltage where as mobility was increased with increase in deposition voltage which show the increment of the grain size and diminishing the scattering of electron in grain boundary. So we have done a great effort to study the effect of deposition voltage on crystal structure, composition, morphology, electric and magnetic properties of Co-based Co2Mn0.5Fe0.5Sn full Heusler compound nanowires. The spin properties in Co2Mn0.5Fe0.5Sn Heusler alloy is of great interest for their practical use which is vigorous study in present as well as in future spintronics devices.