8-12 July 2013
Africa/Johannesburg timezone
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Synthesis, structural and magnetic properties of MnxNi1-xFe2O4 nanoferrites

Presented by Dr. Hafiz M I ABDALLAH on 9 Jul 2013 from 17:40 to 18:40
Type: Poster Presentation
Session: Poster1
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

Glycol-thermal technique was used for the synthesized MnxNi1-xFe2O4 (x = 0.1, 0.3, 0.5) nanoparticle ferrites from high-purity metal chlorides. Structure parameters and magnetic properties were investigated using X-ray powder diffraction (XRD), 57Fe Mössbauer spectroscopy, vibrating sample magnetometer (VSM) on a cryogen free measurement system. XRD results confirmed single-phase formation of the as-prepared samples with average crystallite sizes of about 8 nm having Fd3m space group. The microstrains for the as-prepared samples were relieved by increasing Mn- concentration, x, while the coercivity and lattice parameters were decreased. Temperature and magnetic field dependences as a function of magnetization for the as-prepared sample at = 0.5 in external field of up to 5 T and at isothermal temperatures ranged from 2 K to 300 K. Tiny values of coercive fields indicate superparamagnetic like-behavior of studied compounds are also investigated.

Award

No

Level

PhD

Supervisor

Dr. Thomas Moyo

Paper

Yes

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