8-12 July 2013
Africa/Johannesburg timezone
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A Mössbauer effect investigation of nanosized Mnx(Mg, Co)0.5-xZn0.5Fe2O4

Presented by Ms. Wendy Bonakele DLAMINI on 10 Jul 2013 from 15:40 to 16:00
Type: Oral Presentation
Session: DCMPM2
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

In this paper we report Mn substitution in Zn-Mg and Zn-Co spinel oxides. Single phase nanoferrite powders bearing the chemical formula MnxMg0.5-xZn0.5Fe2O4 and Mn<sub>x</sub>Co<sub>0.5-x</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>(0≤x≤0.5 in steps of 0.1) have been produced by co-precipitation technique. The compounds were characterised by X-ray diffraction, Mössbauer and VSM measurements. The particle size varies between 9 nm and 15 nm. The variation of Mn concentration has significant effects on the structural and magnetic properties. <sup>57</sup>Fe Mössbauer effect spectra show ordered magnetic spin state in all the Mn<sub>x</sub>Co<sub>0.5-x</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> compounds. Transformation from ordered to disordered magnetic state has been obsereved with increasing x in Mn<sub>x</sub>Mg<sub>0.5-x</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>. The variation of the magnetic parameters such as coercive fields and saturation magnetization as a function of Mn concentration is also presented.

Award

No

Level

PhD

Supervisor

Dr. J.Z. Msomi, Msonij1@ukzn.ac.za, University of KwaZulu-Natal

Paper

Yes

Place

Location: A0-60


Primary authors

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Co-authors

  • Dr. Justice MSOMI School of Chemistry and Physics,University of KwaZulu-Natal, P/bag X54001, Durban 4000, South Africa
  • Dr. Thomas MOYO School of Chemistry and Physics,University of KwaZulu-Natal, P/bag X54001, Durban 4000, South Africa
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