Structural and magnetic characteristics of NiO/NiFe2O4/α-Fe2O3 nanocomposite

B. Sahu; U. K. Panigrahi; C. J. Sheppard; A. R.E. Prinsloo; P. Mohanty; P. Mallick

doi:10.1016/j.matchemphys.2023.127759

Structural and magnetic characteristics of NiO/NiFe₂O₄/α-Fe₂O₃ nanocomposite

B. Sahu, U. K. Panigrahi, C. J. Sheppard, A. R.E. Prinsloo, P. Mohanty, P. Mallick

Physics

Maharaja Sriram Chandra Bhanja Deo University

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

5 Citations (Scopus)

Abstract

Effect of Fe concentration in forming NiO/NiFe₂O₄/α-Fe₂O₃ nanocomposite (NC) was probed through structural and magnetic characterizations. Presence of two-magnon mode in Raman spectra confirms the existence of NiFe₂O₄ and α-Fe₂O₃ phases in the background of antiferromagnetic (AFM) NiO matrix. Magnetic study further confirms the occurrence of weak ferromagnetism in the AFM background. The behaviour of temperature dependence of saturation magnetization revealed that the samples exhibit some type of inhomogeneity. The NC samples show robust exchange bias characteristics at room temperature. The occurrence of ferromagnetic like feature in the NC samples could be due to the combine effect of the formation of BMP along with the magnetic inhomogeneity. The samples show the persistence of robust exchange bias field at 300K. The amplification of anisotropic constant with higher Fe concentration in the NC sample could be ideal for device applications like magnetic recording media.

Original language	English
Article number	127759
Journal	Materials Chemistry and Physics
Volume	302
DOIs	https://doi.org/10.1016/j.matchemphys.2023.127759
Publication status	Published - 1 Jul 2023

Keywords

BMP model
Exchange bias
Magnetism
Nanocomposite

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2023.127759

Cite this

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title = "Structural and magnetic characteristics of NiO/NiFe2O4/α-Fe2O3 nanocomposite",

abstract = "Effect of Fe concentration in forming NiO/NiFe2O4/α-Fe2O3 nanocomposite (NC) was probed through structural and magnetic characterizations. Presence of two-magnon mode in Raman spectra confirms the existence of NiFe2O4 and α-Fe2O3 phases in the background of antiferromagnetic (AFM) NiO matrix. Magnetic study further confirms the occurrence of weak ferromagnetism in the AFM background. The behaviour of temperature dependence of saturation magnetization revealed that the samples exhibit some type of inhomogeneity. The NC samples show robust exchange bias characteristics at room temperature. The occurrence of ferromagnetic like feature in the NC samples could be due to the combine effect of the formation of BMP along with the magnetic inhomogeneity. The samples show the persistence of robust exchange bias field at 300K. The amplification of anisotropic constant with higher Fe concentration in the NC sample could be ideal for device applications like magnetic recording media.",

keywords = "BMP model, Exchange bias, Magnetism, Nanocomposite",

author = "B. Sahu and Panigrahi, {U. K.} and Sheppard, {C. J.} and Prinsloo, {A. R.E.} and P. Mohanty and P. Mallick",

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year = "2023",

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doi = "10.1016/j.matchemphys.2023.127759",

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T1 - Structural and magnetic characteristics of NiO/NiFe2O4/α-Fe2O3 nanocomposite

AU - Sahu, B.

AU - Panigrahi, U. K.

AU - Sheppard, C. J.

AU - Prinsloo, A. R.E.

AU - Mohanty, P.

AU - Mallick, P.

PY - 2023/7/1

Y1 - 2023/7/1

N2 - Effect of Fe concentration in forming NiO/NiFe2O4/α-Fe2O3 nanocomposite (NC) was probed through structural and magnetic characterizations. Presence of two-magnon mode in Raman spectra confirms the existence of NiFe2O4 and α-Fe2O3 phases in the background of antiferromagnetic (AFM) NiO matrix. Magnetic study further confirms the occurrence of weak ferromagnetism in the AFM background. The behaviour of temperature dependence of saturation magnetization revealed that the samples exhibit some type of inhomogeneity. The NC samples show robust exchange bias characteristics at room temperature. The occurrence of ferromagnetic like feature in the NC samples could be due to the combine effect of the formation of BMP along with the magnetic inhomogeneity. The samples show the persistence of robust exchange bias field at 300K. The amplification of anisotropic constant with higher Fe concentration in the NC sample could be ideal for device applications like magnetic recording media.

AB - Effect of Fe concentration in forming NiO/NiFe2O4/α-Fe2O3 nanocomposite (NC) was probed through structural and magnetic characterizations. Presence of two-magnon mode in Raman spectra confirms the existence of NiFe2O4 and α-Fe2O3 phases in the background of antiferromagnetic (AFM) NiO matrix. Magnetic study further confirms the occurrence of weak ferromagnetism in the AFM background. The behaviour of temperature dependence of saturation magnetization revealed that the samples exhibit some type of inhomogeneity. The NC samples show robust exchange bias characteristics at room temperature. The occurrence of ferromagnetic like feature in the NC samples could be due to the combine effect of the formation of BMP along with the magnetic inhomogeneity. The samples show the persistence of robust exchange bias field at 300K. The amplification of anisotropic constant with higher Fe concentration in the NC sample could be ideal for device applications like magnetic recording media.

KW - BMP model

KW - Exchange bias

KW - Magnetism

KW - Nanocomposite

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