Highly ordered Co2MnSn full Heusler alloy nanowire (NW) arrays were for the first time electrochemically synthesized into an anodic aluminum oxide (AAO) template. In order to obtain the full Heusler alloy composition (2:1:1) in NWs, the sinusoidal waveform of different voltages was applied during electrodeposition. Elemental analysis exhibited that Co0.48Mn0.25Sn0.26 and Co0.49Mn0.26Sn0.24 NWs were successfully synthesized at 16 V and 17 V, where the nominal composition ratio of Co:Mn:Sn was equal to Co2MnSn full Heusler alloys composition. The crystal structure demonstrated that Heusler NWs were crystallized into an A2-type magnetically disordered structure with an average lattice constant of ∼5.83 Å. The magnetization behavior of NWs predicated that the easy axis was along the wire long axis due to the dominance of shape anisotropy. An average saturation magnetization (Ms) and coercivity (Hc) along the easy axis of Heusler NWs was obtained at about ∼2500 emu/cm3 and ∼440 Oe, respectively. The difference between total effective anisotropy energy (Keff) and magnetostatic anisotropy energies (Kms) illustrated that the magnetic anisotropy in Co0.49Mn0.26Sn0.24 NWs was also mainly contributed by magnetocrystalline anisotropy. Furthermore, the angular dependence of Hc revealed that the magnetization reversal mode in Heusler NWs existed on the vortex mode and transversal mode at low and high angles, respectively.

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La3+ ions substituted manganese ferrite (MnFe2-x La x O4) nanoparticles via reverse micelles strategy were synthesized and their structural and electrical properties are discussed in this article. Using low-cost precursors, mono-dispersed, and well crystalline MnFe2-x La x O4 nanoparticles were prepared at low temperature. X-ray diffraction (XRD) explored cubic spinel structure with minute secondary phase as LaFeO3. The crystallite size of MnFe2-x La x O4 was found to increase from 12.82 nm to 15.95 nm with increased La3+ ions contents. The room temperature Fourier transform infrared (FTIR) spectra were recorded in the wavenumber range 1000–400 cm−1 that showed the vibrational bands of octahedral and tetrahedral complexes. These bands are the fingerprints of spinel ferrites. Surface morphology characterized by field emission scanning electron microscopy (FESEM) revealed the relative spherical morphology of prepared spinel ferrite particles. The elemental composition analysis from Energy-dispersive x-ray (EDX) spectroscopy confirmed the presence of expected elements in the samples. The modification in resistivity and the enhancement in the dielectric parameters suggested the possible utilization of these soft ferrite nanoparticles in advanced electronics, especially the devices that are required to operate at high frequencies.