Structural and Magnetic Properties of Co2FeAl Full Heusler Alloys synthesized by Hydrothermal Method

Abstract

Full heusler alloys have attracted the attention of research community owing to its potential applications in spintronic devices. Hydrothermal technique is used to prepare Co2FeAl full Heusler alloys. Molarity of the electrolytes is varied as 1.2M, 1.4M, 1.6M, 1.8M & 2.0M. The prepared Co2FeAl full Heusler alloys nanoparticles are characterized by XRD, VSM, FTIR and hall measurements. Mixed phases of Co2FeAl -hexagonal and CoAl-tetragonal are observed for the samples having molarity ranging from 1.2M to 1.6M. Whereas, pure Co2FeAl hexagonal phase is attained for the samples prepared with 1.8M & 2.0M solutions. FTIR (Fourier transform infrared spectra) is recorded for the Co2FeAl based full-heuslar alloy nanoparticles with varying molarity ranging from (1.2M-2.0M) that is done in the range of mid IR (300-500 cm-1). FTIR analyzes structural & chemical changes due to different functional-groups. Magnetic analysis of Co2FeAl based full-heuslar alloy nanoparticles shows the soft ferromagnetic behavior for all the samples. Current-voltage (I- V) characteristics are measured for the variation in molarities. Temperature dependent Current-voltage (I-V) characteristics are measured for the samples with pure Co2FeAl full heuslar alloy structure i.e. sample prepared with 2.0 M solution