• Home
  • Search Results
  • Al3+ ions dependent structural and magnetic properties of Co-Ni nano-alloys.

Al3+ ions dependent structural and magnetic properties of Co-Ni nano-alloys.

Journal of nanoscience and nanotechnology (2014-04-18)
R H Kadam, Suresh T Alone, Anil S Gaikwad, A P Birajdar, Sagar E Shirsath
ABSTRACT

Ferrite samples with a chemical formula Co0.5Ni0.5Al(x)Fe(2-x)O4 (where x = 0.0, 0.25, 0.5, 0.75 and 1.0) were synthesized by sol-gel auto-combustion method. The synthesized samples were annealed at 600 degrees C for 4 h. An analysis of X-ray diffraction (XRD) patterns reveals the formation of single phase cubic spinel structure. The lattice parameter decreased linearly with the increasing Al content x. Nano size of the powders were confirmed by the transmission electron micrographs (TEM). Particle size, bulk density decreased whereas specific surface area and porosity of the samples increased with the Al substitution. Cation distribution of constituent ions shows linear dependence of Al substitution. Based on the cation distribution obtained from XRD data, structural parameters such as lattice parameters, ionic radii of available sites and the oxygen parameter 'u' is calculated. Saturation magnetization (M(s)), magneton number (n(B)) and coercivity (H(c)) decreased with the Al substitution. Possible explanation for the observed structural and magnetic behavior with various Al content are discussed.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Raney®-Nickel, W.R. Grace and Co. Raney® 2800, slurry, in H2O, active catalyst
Sigma-Aldrich
Nickel, nanopowder, <100 nm avg. part. size, ≥99% trace metals basis
Sigma-Aldrich
Aluminum, foil, thickness 0.45-0.55 mm, 99.999% trace metals basis
Sigma-Aldrich
Cobalt, powder, <150 μm, ≥99.9% trace metals basis
Sigma-Aldrich
Aluminum, foil, thickness 0.25 mm, 99.999% trace metals basis
Sigma-Aldrich
Cobalt, powder, 2 μm particle size, 99.8% trace metals basis
Sigma-Aldrich
Aluminum, powder, ≥91% (complexometric)
Sigma-Aldrich
Nickel, foil, thickness 0.125 mm, ≥99.9%
Sigma-Aldrich
Nickel, powder, <150 μm, 99.99% trace metals basis
Sigma-Aldrich
Aluminum, wire, diam. 1.0 mm, 99.999% trace metals basis
Sigma-Aldrich
Aluminum, ReagentPlus®, beads, 5-15 mm, 99.9% trace metals basis
Sigma-Aldrich
Raney®-Nickel, W.R. Grace and Co. Raney® 2400, slurry, in H2O, active catalyst
Sigma-Aldrich
Aluminum, granular, <1 mm, 99.7% trace metals basis
Sigma-Aldrich
Aluminum, wire, diam. 0.58 mm, ≥99.99% trace metals basis
Sigma-Aldrich
Nickel, foil, thickness 0.5 mm, 99.98% trace metals basis
Sigma-Aldrich
Nickel, wire, diam. 0.25 mm, ≥99.9%
Sigma-Aldrich
Aluminum, pellets, 3-12 mm, 99.99% trace metals basis
Sigma-Aldrich
Aluminum, evaporation slug, diam. × L 6.3 mm × 6.3 mm, 99.999% trace metals basis
Sigma-Aldrich
Cobalt, Carbon coated magnetic, nanopowder, <50 nm particle size (TEM), ≥99%
Sigma-Aldrich
Nickel, foil, thickness 0.1 mm, 99.98% trace metals basis
Sigma-Aldrich
Cobalt, granular, 99.99% trace metals basis
Sigma-Aldrich
Nickel, wire, diam. 0.5 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Aluminum, foil, thickness 8 μm, 99% trace metals basis
Aluminum, rod, 100mm, diameter 12.7mm, 99%
Sigma-Aldrich
Cobalt, foil, thickness 0.1 mm, 99.95% trace metals basis
Sigma-Aldrich
Nickel, wire, diam. 0.5 mm, ≥99.99% trace metals basis
Sigma-Aldrich
Aluminum, ACS reagent, 99%, wire, wire diam. ~1.5 mm
Sigma-Aldrich
Cobalt, pieces, 99.5% trace metals basis
Sigma-Aldrich
Aluminum, sputtering target, diam. × thickness 3.00 in. × 0.125 in., 99.9995% trace metals basis
Aluminum, sphere, 100pcs, diameter 6.0mm, 99%