Grain size effects on the magnetic properties of ZnxMn1-xFe2O4 nanoferrites

J. Z. Msomi; T. A. Nhlapo; T. Moyo; J. Snyman; A. M. Strydom

doi:10.1016/j.jmmm.2014.01.012

Grain size effects on the magnetic properties of Zn_xMn_1-xFe₂O₄ nanoferrites

J. Z. Msomi, T. A. Nhlapo, T. Moyo, J. Snyman, A. M. Strydom

Physics

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Single phase nanoferrites bearing the chemical formula Zn_xMn_1-xFe₂O₄ (0≤x≤1.0) have been produced under low reaction temperature of 200 °C. The compounds were characterized by X-ray diffraction, Mössbauer and SQUID measurements. The particle size varies between 5 nm and 14 nm. The particle size dependence of the magnetic properties is investigated. Our results indicate spin-glass behavior at temperatures between 100 K and 200 K. The variation of Zn concentration has also significant effects on the structural and magnetic properties. The complex variation of lattice parameter with x is explained on the basis of redistribution of Zn atoms in both tetrahedral (A) and octahedral (B) sites. The ⁵⁷Fe Mössbauer effect spectra show paramagnetic spin state in all the compounds.

Original language	English
Pages (from-to)	74-77
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	373
DOIs	https://doi.org/10.1016/j.jmmm.2014.01.012
Publication status	Published - 1 Mar 2015

Keywords

Ferrite
Magnetization
Mössbauer spectroscopy
Nano-particle

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2014.01.012

Cite this

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title = "Grain size effects on the magnetic properties of ZnxMn1-xFe2O4 nanoferrites",

abstract = "Single phase nanoferrites bearing the chemical formula ZnxMn1-xFe2O4 (0≤x≤1.0) have been produced under low reaction temperature of 200 °C. The compounds were characterized by X-ray diffraction, M{\"o}ssbauer and SQUID measurements. The particle size varies between 5 nm and 14 nm. The particle size dependence of the magnetic properties is investigated. Our results indicate spin-glass behavior at temperatures between 100 K and 200 K. The variation of Zn concentration has also significant effects on the structural and magnetic properties. The complex variation of lattice parameter with x is explained on the basis of redistribution of Zn atoms in both tetrahedral (A) and octahedral (B) sites. The 57Fe M{\"o}ssbauer effect spectra show paramagnetic spin state in all the compounds.",

keywords = "Ferrite, Magnetization, M{\"o}ssbauer spectroscopy, Nano-particle",

author = "Msomi, \{J. Z.\} and Nhlapo, \{T. A.\} and T. Moyo and J. Snyman and Strydom, \{A. M.\}",

year = "2015",

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journal = "Journal of Magnetism and Magnetic Materials",

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T1 - Grain size effects on the magnetic properties of ZnxMn1-xFe2O4 nanoferrites

AU - Msomi, J. Z.

AU - Nhlapo, T. A.

AU - Moyo, T.

AU - Snyman, J.

AU - Strydom, A. M.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - Single phase nanoferrites bearing the chemical formula ZnxMn1-xFe2O4 (0≤x≤1.0) have been produced under low reaction temperature of 200 °C. The compounds were characterized by X-ray diffraction, Mössbauer and SQUID measurements. The particle size varies between 5 nm and 14 nm. The particle size dependence of the magnetic properties is investigated. Our results indicate spin-glass behavior at temperatures between 100 K and 200 K. The variation of Zn concentration has also significant effects on the structural and magnetic properties. The complex variation of lattice parameter with x is explained on the basis of redistribution of Zn atoms in both tetrahedral (A) and octahedral (B) sites. The 57Fe Mössbauer effect spectra show paramagnetic spin state in all the compounds.

AB - Single phase nanoferrites bearing the chemical formula ZnxMn1-xFe2O4 (0≤x≤1.0) have been produced under low reaction temperature of 200 °C. The compounds were characterized by X-ray diffraction, Mössbauer and SQUID measurements. The particle size varies between 5 nm and 14 nm. The particle size dependence of the magnetic properties is investigated. Our results indicate spin-glass behavior at temperatures between 100 K and 200 K. The variation of Zn concentration has also significant effects on the structural and magnetic properties. The complex variation of lattice parameter with x is explained on the basis of redistribution of Zn atoms in both tetrahedral (A) and octahedral (B) sites. The 57Fe Mössbauer effect spectra show paramagnetic spin state in all the compounds.

KW - Ferrite

KW - Magnetization

KW - Mössbauer spectroscopy

KW - Nano-particle

UR - https://www.scopus.com/pages/publications/84908313364

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DO - 10.1016/j.jmmm.2014.01.012

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