| Effect of Sn on Magnetic and Dielectric Properties of
Ni-Co Spinel Ferrite over LF and MF Range |
Karunanithi Ashok*, Basheer Masin, Hariharan Sreemoolanadhan and Mariamma Mathew
Pages : 131-136
DOI : 10.1080/0371750X.2019.1632226 |
| Abstract |
| Nickel-cobalt ferrite (NCF) without Sn-dopant and with (x = 0 to 0.1%),
(Ni0.7Co0.3)(Fe2–xSnx)O4+d, have been synthesized through solid-state route.
Calcination of oxides at 900oC yielded spinel phase as confirmed by X-ray
diffraction. Sn doping does not show much variation in lattice constants, but
slightly increases crystallite size. Green compacts have been well sintered in
1150o-1200oC for 10 h. Microstructure of fractured specimens obtained using field
emission scanning electron microscope show well packed polygonal grains with
2-3 m size range. Dielectric and magnetic behavior of pristine and Sn-doped
NCF have been measured in 100 Hz to 1 MHz range using a precision LCR meter,
Sn-doping up to x=0.1 improves the dielectric properties of NCF, but deteriorates
the magnetic properties.
[Keywords: Magneto-dielectric, Nickel-cobalt ferrite, Spinel ferrite] |
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