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

ABSTRAKT

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.

MATERIAŁY

Numer produktu

Marka

Opis produktu

733369

Sigma-Aldrich

Aluminum, foil, thickness 8 μm, 99% trace metals basis

IRMM523B

Aluminum, IRMM^®, certified reference material, 1.0 mm foil

IRMM523C

Aluminum, IRMM^®, certified reference material, 1.0 mm wire

266981

Sigma-Aldrich

Nickel, powder, <50 μm, 99.7% trace metals basis

267074

Sigma-Aldrich

Nickel, rod, diam. 6.35 mm, ≥99.99% trace metals basis

11009

Sigma-Aldrich

Aluminum, powder, ≥91% (complexometric)

326380

Sigma-Aldrich

Cobalt, foil, thickness 0.1 mm, ≥99.99%

433705

Sigma-Aldrich

Aluminum, evaporation slug, diam. × L 6.3 mm × 6.3 mm, 99.999% trace metals basis

577995

Sigma-Aldrich

Nickel, nanopowder, <100 nm avg. part. size, ≥99% trace metals basis

203076

Sigma-Aldrich

Cobalt, granular, 99.99% trace metals basis

398810

Sigma-Aldrich

Cobalt, rod, diam. 5.0 mm, 99.95% trace metals basis

266655

Sigma-Aldrich

Cobalt, pieces, 99.5% trace metals basis

266701

Sigma-Aldrich

Cobalt, wire, diam. 1.0 mm, 99.995% trace metals basis

356867

Sigma-Aldrich

Cobalt, foil, thickness 0.1 mm, 99.95% trace metals basis

357588

Sigma-Aldrich

Nickel, foil, thickness 0.1 mm, 99.98% trace metals basis

357626

Sigma-Aldrich

Nickel, wire, diam. 0.5 mm, ≥99.9% trace metals basis

GF63970498

Aluminum, honeycomb, 300x300mm, thickness 26.5mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm³, phenolic adhesive (resin), facing skin carbon fiber / epoxy, 99.9%

GF17203003

Cobalt, foil, 8mm disks, thickness 0.02mm, 99.9%

GF28868439

Nickel, foil, 50mm disks, thickness 0.005mm, as rolled, 99.9%

GF03467202

Aluminum, honeycomb, 300x300mm, thickness 52.3mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm³, phenolic adhesive (resin), facing skin glass fiber 0.75mm, 99.9%

GF89559343

Cobalt, foil, 4mm disks, thickness 0.005mm, 99.9%

GF94077962

Cobalt, foil, 8mm disks, thickness 0.0125mm, 99.9%

GF99715876

Cobalt, foil, not light tested, 100x100mm, thickness 0.006mm, 99.9%

GF69765890

Cobalt, foil, 4mm disks, thickness 0.05mm, as rolled, 99.99+%

GF72500161

Cobalt, foil, 6mm disks, thickness 0.125mm, annealed, 99.9%

GF34612567

Nickel, foil, 5m coil, thickness 0.05mm, coil width 2mm, annealed, 99%