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  • 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

Nickel, foil, not light tested, 25x25mm, thickness 0.001mm, 99.95%
Nickel, foil, 300x300mm, thickness 0.125mm, annealed, 99%
Nickel, foil, 0.5m coil, thickness 0.025mm, annealed, 99%
Aluminum, wire reel, 5m, diameter 0.05mm, as drawn, 99.99+%
Nickel, foil, 50x50mm, thickness 1.0mm, as rolled, 99.999%
Nickel, foil, light tested, 50x50mm, thickness 0.05mm, 99.9%
Aluminum, wire reel, 5m, diameter 0.25mm, as drawn, 99.999%
Nickel, mesh, 30x30mm, nominal aperture 0.34mm, thickness 0.025mm, wire diameter 0.041mm, 70 wires/inch, open area 80%, electro-formed mesh, 99.9%
Nickel, foil, light tested, 300x300mm, thickness 0.03mm, 99.9%
Aluminum, wire reel, 50m, diameter 0.25mm, hard, 99.99+%
Nickel, foil, 50x50mm, thickness 0.25mm, annealed, 99%
Nickel, foil, 25x25mm, thickness 0.5mm, as rolled, 99.99+%
Nickel, foil, 0.5m coil, thickness 0.075mm, as rolled, 99.98%
Nickel, wire reel, 10m, diameter 0.4mm, as drawn, 99%
Nickel, wire reel, 10m, diameter 0.25mm, annealed, 99%
Aluminum, wire reel, 5m, diameter 1.0mm, as drawn, 99.999%
Nickel, foil, 4mm disks, thickness 0.025mm, as rolled, 100%
Nickel, mesh, 130x130mm, nominal aperture 0.34mm, thickness 0.025mm, wire diameter 0.041mm, 70 wires/inch, open area 80%, electro-formed mesh, 99.9%
Nickel, foil, 0.5m coil, thickness 0.025mm, coil width 600mm, as rolled, 99%
Nickel, foil, 4mm disks, thickness 0.025mm, 99.9%
Nickel, wire reel, 0.5m, diameter 1.0mm, as drawn, 99.99+%
Nickel, foil, not light tested, 50x50mm, thickness 0.0025mm, 99.95%
Aluminum, wire reel, 5m, diameter 0.025mm, as drawn, 99.99+%
Nickel, foil, 50x50mm, thickness 1.0mm, as rolled, 99.99+%
Nickel, foil, 50x50mm, thickness 0.125mm, as rolled, 99.999%
Nickel, foil, 25x25mm, thickness 0.25mm, as rolled, 99.999%
Nickel, foil, 0.5m coil, thickness 1.0mm, annealed, 99%
Nickel, rod, 100mm, diameter 10.0mm, 99.99+%
Aluminum, wire reel, 5m, diameter 1.5mm, as drawn, 99.999%
Aluminum, wire reel, 50m, diameter 0.063mm, annealed, 99.99%