Structural, optical and magnetic properties of (ZnO)                         1-x                         (MnO                         2                         )                         x                          thin films deposited at room temperature

S. Karamat; S. Mahmood; J. J. Lin; Z. Y. Pan; P. Lee; T. L. Tan; S. V. Springham; R. V. Ramanujan; R. S. Rawat

doi:10.1016/j.apsusc.2008.05.318

Structural, optical and magnetic properties of (ZnO) _1-x (MnO ₂ ) _x thin films deposited at room temperature

S. Karamat, S. Mahmood, J. J. Lin, Z. Y. Pan, P. Lee, T. L. Tan, S. V. Springham, R. V. Ramanujan, R. S. Rawat^*

^*Corresponding author for this work

Nanyang Technological University

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

54 Citations (Scopus)

Abstract

The structural, magnetic and optical properties of (ZnO) _1-x (MnO ₂ ) _x (with x = 0.03 and 0.05) thin films deposited by pulsed laser deposition (PLD) were studied. The pellets used as target, sintered at different temperatures ranging from 500 °C to 900 °C, were prepared by conventional solid state method using ZnO and MnO ₂ powders. The observation of non-monotonic shift in peak position of most preferred (1 0 1) ZnO diffraction plane in XRD spectra of pellets confirmed the substitution of Mn ions in ZnO lattice of the sintered targets. The as-deposited thin film samples are found to be polycrystalline with the preferred orientation mostly along (1 1 0) diffraction plane. The UV-vis spectroscopy of the thin films revealed that the energy band gap exhibit blue shift with increasing Mn content which could be attributed to Burstein-Moss shift caused by Mn doping of the ZnO. The deposited thin films exhibit room temperature ferromagnetism having effective magnetic moment per Mn atom in the range of 0.9-1.4μ _B for both compositions.

Original language	English
Pages (from-to)	7285-7289
Number of pages	5
Journal	Applied Surface Science
Volume	254
Issue number	22
DOIs	https://doi.org/10.1016/j.apsusc.2008.05.318
Publication status	Published - Sept 15 2008
Externally published	Yes

ASJC Scopus Subject Areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

Keywords

Diluted magnetic semiconductor
Pulsed laser deposition
Thin films

Access to Document

10.1016/j.apsusc.2008.05.318

Cite this

Karamat, S., Mahmood, S., Lin, J. J., Pan, Z. Y., Lee, P., Tan, T. L., Springham, S. V., Ramanujan, R. V., & Rawat, R. S. (2008). Structural, optical and magnetic properties of (ZnO) _1-x (MnO ₂ ) _x thin films deposited at room temperature Applied Surface Science, 254(22), 7285-7289. https://doi.org/10.1016/j.apsusc.2008.05.318

Karamat, S. ; Mahmood, S. ; Lin, J. J. et al. / Structural, optical and magnetic properties of (ZnO) _1-x (MnO ₂ ) _x thin films deposited at room temperature In: Applied Surface Science. 2008 ; Vol. 254, No. 22. pp. 7285-7289.

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title = " Structural, optical and magnetic properties of (ZnO) 1-x (MnO 2 ) x thin films deposited at room temperature ",

abstract = " The structural, magnetic and optical properties of (ZnO) 1-x (MnO 2 ) x (with x = 0.03 and 0.05) thin films deposited by pulsed laser deposition (PLD) were studied. The pellets used as target, sintered at different temperatures ranging from 500 °C to 900 °C, were prepared by conventional solid state method using ZnO and MnO 2 powders. The observation of non-monotonic shift in peak position of most preferred (1 0 1) ZnO diffraction plane in XRD spectra of pellets confirmed the substitution of Mn ions in ZnO lattice of the sintered targets. The as-deposited thin film samples are found to be polycrystalline with the preferred orientation mostly along (1 1 0) diffraction plane. The UV-vis spectroscopy of the thin films revealed that the energy band gap exhibit blue shift with increasing Mn content which could be attributed to Burstein-Moss shift caused by Mn doping of the ZnO. The deposited thin films exhibit room temperature ferromagnetism having effective magnetic moment per Mn atom in the range of 0.9-1.4μ B for both compositions.",

keywords = "Diluted magnetic semiconductor, Pulsed laser deposition, Thin films",

author = "S. Karamat and S. Mahmood and Lin, {J. J.} and Pan, {Z. Y.} and P. Lee and Tan, {T. L.} and Springham, {S. V.} and Ramanujan, {R. V.} and Rawat, {R. S.}",

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Karamat, S, Mahmood, S, Lin, JJ, Pan, ZY, Lee, P, Tan, TL, Springham, SV, Ramanujan, RV & Rawat, RS 2008, ' Structural, optical and magnetic properties of (ZnO) _1-x (MnO ₂ ) _x thin films deposited at room temperature ', Applied Surface Science, vol. 254, no. 22, pp. 7285-7289. https://doi.org/10.1016/j.apsusc.2008.05.318

Structural, optical and magnetic properties of (ZnO) _1-x (MnO ₂ ) _x thin films deposited at room temperature . / Karamat, S.; Mahmood, S.; Lin, J. J. et al.
In: Applied Surface Science, Vol. 254, No. 22, 15.09.2008, p. 7285-7289.

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

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AU - Ramanujan, R. V.

AU - Rawat, R. S.

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N2 - The structural, magnetic and optical properties of (ZnO) 1-x (MnO 2 ) x (with x = 0.03 and 0.05) thin films deposited by pulsed laser deposition (PLD) were studied. The pellets used as target, sintered at different temperatures ranging from 500 °C to 900 °C, were prepared by conventional solid state method using ZnO and MnO 2 powders. The observation of non-monotonic shift in peak position of most preferred (1 0 1) ZnO diffraction plane in XRD spectra of pellets confirmed the substitution of Mn ions in ZnO lattice of the sintered targets. The as-deposited thin film samples are found to be polycrystalline with the preferred orientation mostly along (1 1 0) diffraction plane. The UV-vis spectroscopy of the thin films revealed that the energy band gap exhibit blue shift with increasing Mn content which could be attributed to Burstein-Moss shift caused by Mn doping of the ZnO. The deposited thin films exhibit room temperature ferromagnetism having effective magnetic moment per Mn atom in the range of 0.9-1.4μ B for both compositions.

AB - The structural, magnetic and optical properties of (ZnO) 1-x (MnO 2 ) x (with x = 0.03 and 0.05) thin films deposited by pulsed laser deposition (PLD) were studied. The pellets used as target, sintered at different temperatures ranging from 500 °C to 900 °C, were prepared by conventional solid state method using ZnO and MnO 2 powders. The observation of non-monotonic shift in peak position of most preferred (1 0 1) ZnO diffraction plane in XRD spectra of pellets confirmed the substitution of Mn ions in ZnO lattice of the sintered targets. The as-deposited thin film samples are found to be polycrystalline with the preferred orientation mostly along (1 1 0) diffraction plane. The UV-vis spectroscopy of the thin films revealed that the energy band gap exhibit blue shift with increasing Mn content which could be attributed to Burstein-Moss shift caused by Mn doping of the ZnO. The deposited thin films exhibit room temperature ferromagnetism having effective magnetic moment per Mn atom in the range of 0.9-1.4μ B for both compositions.

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Karamat S, Mahmood S, Lin JJ, Pan ZY, Lee P, Tan TL et al. Structural, optical and magnetic properties of (ZnO) _1-x (MnO ₂ ) _x thin films deposited at room temperature Applied Surface Science. 2008 Sept 15;254(22):7285-7289. doi: 10.1016/j.apsusc.2008.05.318