Structural, elemental, optical and magnetic study of Fe doped ZnO and impurity phase formation

S. Karamat; R. S. Rawat; P. Lee; T. L. Tan; R. V. Ramanujan

doi:10.1016/j.pnsc.2014.03.009

Structural, elemental, optical and magnetic study of Fe doped ZnO and impurity phase formation

S. Karamat^*, R. S. Rawat, P. Lee, T. L. Tan, R. V. Ramanujan

^*Corresponding author for this work

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

103 Citations (Scopus)

Abstract

We have prepared a series of (ZnO)_1-x(Fe₂O₃)_x≤0.10 bulk samples with various concentrations of Fe dopant by ball milling and investigated their structural, compositional, optical and magnetic properties by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectrometer and vibrating sample magnetometer (VSM), respectively. Information about different impurity phases was obtained through Rietveld refinements of XRD data analysis. XPS results showed different valence states (Fe²⁺ and Fe³⁺) supported by shaking satellite peaks in samples. With increasing Fe doping percentage, the crystal quality deteriorated and a shift of E₂ low band (characteristic of ZnO) has been observed in Raman spectra. Energy band gap estimated from reflectance UV-vis spectroscopy showed shift for all bulk samples. The magnetic behavior was examined using a vibrating sample magnetometer (VSM), indicating ferromagnetic behavior at room temperature (300K). The effective magnetic moment per Fe atom decreases with increase in doping percentage which indicates that ferromagnetic behavior arises from the substitution of Fe ions in the ZnO lattice.

Original language	English
Pages (from-to)	142-149
Number of pages	8
Journal	Progress in Natural Science: Materials International
Volume	24
Issue number	2
DOIs	https://doi.org/10.1016/j.pnsc.2014.03.009
Publication status	Published - 2014
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 Chinese Materials Research Society.

ASJC Scopus Subject Areas

General Materials Science

Keywords

Band gap
Dilute magnetic semiconductor
Fe doped ZnO
Magnetic moment
Rietveld refinements
X-ray spectroscopy

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10.1016/j.pnsc.2014.03.009

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title = "Structural, elemental, optical and magnetic study of Fe doped ZnO and impurity phase formation",

abstract = "We have prepared a series of (ZnO)1-x(Fe2O3)x≤0.10 bulk samples with various concentrations of Fe dopant by ball milling and investigated their structural, compositional, optical and magnetic properties by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectrometer and vibrating sample magnetometer (VSM), respectively. Information about different impurity phases was obtained through Rietveld refinements of XRD data analysis. XPS results showed different valence states (Fe2+ and Fe3+) supported by shaking satellite peaks in samples. With increasing Fe doping percentage, the crystal quality deteriorated and a shift of E2 low band (characteristic of ZnO) has been observed in Raman spectra. Energy band gap estimated from reflectance UV-vis spectroscopy showed shift for all bulk samples. The magnetic behavior was examined using a vibrating sample magnetometer (VSM), indicating ferromagnetic behavior at room temperature (300K). The effective magnetic moment per Fe atom decreases with increase in doping percentage which indicates that ferromagnetic behavior arises from the substitution of Fe ions in the ZnO lattice.",

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author = "S. Karamat and Rawat, \{R. S.\} and P. Lee and Tan, \{T. L.\} and Ramanujan, \{R. V.\}",

note = "Publisher Copyright: {\textcopyright} 2014 Chinese Materials Research Society.",

year = "2014",

doi = "10.1016/j.pnsc.2014.03.009",

language = "English",

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AU - Karamat, S.

AU - Rawat, R. S.

AU - Lee, P.

AU - Tan, T. L.

AU - Ramanujan, R. V.

PY - 2014

Y1 - 2014

N2 - We have prepared a series of (ZnO)1-x(Fe2O3)x≤0.10 bulk samples with various concentrations of Fe dopant by ball milling and investigated their structural, compositional, optical and magnetic properties by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectrometer and vibrating sample magnetometer (VSM), respectively. Information about different impurity phases was obtained through Rietveld refinements of XRD data analysis. XPS results showed different valence states (Fe2+ and Fe3+) supported by shaking satellite peaks in samples. With increasing Fe doping percentage, the crystal quality deteriorated and a shift of E2 low band (characteristic of ZnO) has been observed in Raman spectra. Energy band gap estimated from reflectance UV-vis spectroscopy showed shift for all bulk samples. The magnetic behavior was examined using a vibrating sample magnetometer (VSM), indicating ferromagnetic behavior at room temperature (300K). The effective magnetic moment per Fe atom decreases with increase in doping percentage which indicates that ferromagnetic behavior arises from the substitution of Fe ions in the ZnO lattice.

AB - We have prepared a series of (ZnO)1-x(Fe2O3)x≤0.10 bulk samples with various concentrations of Fe dopant by ball milling and investigated their structural, compositional, optical and magnetic properties by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectrometer and vibrating sample magnetometer (VSM), respectively. Information about different impurity phases was obtained through Rietveld refinements of XRD data analysis. XPS results showed different valence states (Fe2+ and Fe3+) supported by shaking satellite peaks in samples. With increasing Fe doping percentage, the crystal quality deteriorated and a shift of E2 low band (characteristic of ZnO) has been observed in Raman spectra. Energy band gap estimated from reflectance UV-vis spectroscopy showed shift for all bulk samples. The magnetic behavior was examined using a vibrating sample magnetometer (VSM), indicating ferromagnetic behavior at room temperature (300K). The effective magnetic moment per Fe atom decreases with increase in doping percentage which indicates that ferromagnetic behavior arises from the substitution of Fe ions in the ZnO lattice.

KW - Band gap

KW - Dilute magnetic semiconductor

KW - Fe doped ZnO

KW - Magnetic moment

KW - Rietveld refinements

KW - X-ray spectroscopy

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Structural, elemental, optical and magnetic study of Fe doped ZnO and impurity phase formation

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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