Investigation of optical and magnetic properties of Mn-doped tetragonal ZrO2 nanocrystals

Sangaraju Sambasivam; Chandu V.V. Muralee Gopi; Pardha Saradhi Maram; Hammad Mueen Arbi; Venkatesha Narayanaswamy; Aleksandr S. Kamzin; Ihab M. Obaidat

doi:10.1016/j.jssc.2020.121872

Investigation of optical and magnetic properties of Mn-doped tetragonal ZrO₂ nanocrystals

Sangaraju Sambasivam, Chandu V.V. Muralee Gopi, Pardha Saradhi Maram, Hammad Mueen Arbi, Venkatesha Narayanaswamy, Aleksandr S. Kamzin, Ihab M. Obaidat

Department of Physics

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

5 Citations (Scopus)

Abstract

Pure and Mn-doped ZrO₂ nanocrystals (Zr_1-xMn_xO₂) with varying Mn concentrations (x = 0.02, 0.04, 0.06, and 0.08) have been synthesized using sol-gel method. The effect of Mn doping concentration on structural, optical and magnetic properties has been investigated. X-ray diffraction data and SAED analysis revealed that all Zr_1-xMn_xO₂ nanocrystals have a tetragonal structure without any secondary phase. The average crystallite size obtained from XRD decreases (within the experimental uncertainty) with increased Mn concentration. Magnetic measurements have revealed that Zr_0.98Mn_0.02O₂ nanocrystalline sample exhibits both low and room temperature ferromagnetism. The origin of ferromagnetism is attributed to the anionic vacancies created due to Mn doping in ZrO₂. Higher Mn concentrations shows superparamagnetism whereas pure ZrO₂ displayed diamagnetic behavior. The UV–Vis absorption spectra showed a wide absorption peak at 200–330 nm, and a redshift was observed in the bandgap with an increase in the concentration of Mn²⁺.

Original language	English
Article number	121872
Journal	Journal of Solid State Chemistry
Volume	294
DOIs	https://doi.org/10.1016/j.jssc.2020.121872
Publication status	Published - Feb 2021

Keywords

Ferromagnetism
Mn-doped ZrO
Nanocrystal
Sol gel
Vacancies

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.jssc.2020.121872

Cite this

@article{115da919c6724d09bceb1a95c22ddc23,

title = "Investigation of optical and magnetic properties of Mn-doped tetragonal ZrO2 nanocrystals",

abstract = "Pure and Mn-doped ZrO2 nanocrystals (Zr1-xMnxO2) with varying Mn concentrations (x = 0.02, 0.04, 0.06, and 0.08) have been synthesized using sol-gel method. The effect of Mn doping concentration on structural, optical and magnetic properties has been investigated. X-ray diffraction data and SAED analysis revealed that all Zr1-xMnxO2 nanocrystals have a tetragonal structure without any secondary phase. The average crystallite size obtained from XRD decreases (within the experimental uncertainty) with increased Mn concentration. Magnetic measurements have revealed that Zr0.98Mn0.02O2 nanocrystalline sample exhibits both low and room temperature ferromagnetism. The origin of ferromagnetism is attributed to the anionic vacancies created due to Mn doping in ZrO2. Higher Mn concentrations shows superparamagnetism whereas pure ZrO2 displayed diamagnetic behavior. The UV–Vis absorption spectra showed a wide absorption peak at 200–330 nm, and a redshift was observed in the bandgap with an increase in the concentration of Mn2+.",

keywords = "Ferromagnetism, Mn-doped ZrO, Nanocrystal, Sol gel, Vacancies",

author = "Sangaraju Sambasivam and {Muralee Gopi}, {Chandu V.V.} and Maram, {Pardha Saradhi} and Arbi, {Hammad Mueen} and Venkatesha Narayanaswamy and Kamzin, {Aleksandr S.} and Obaidat, {Ihab M.}",

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year = "2021",

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doi = "10.1016/j.jssc.2020.121872",

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volume = "294",

journal = "Journal of Solid State Chemistry",

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AU - Sambasivam, Sangaraju

AU - Muralee Gopi, Chandu V.V.

AU - Maram, Pardha Saradhi

AU - Arbi, Hammad Mueen

AU - Narayanaswamy, Venkatesha

AU - Kamzin, Aleksandr S.

AU - Obaidat, Ihab M.

PY - 2021/2

Y1 - 2021/2

N2 - Pure and Mn-doped ZrO2 nanocrystals (Zr1-xMnxO2) with varying Mn concentrations (x = 0.02, 0.04, 0.06, and 0.08) have been synthesized using sol-gel method. The effect of Mn doping concentration on structural, optical and magnetic properties has been investigated. X-ray diffraction data and SAED analysis revealed that all Zr1-xMnxO2 nanocrystals have a tetragonal structure without any secondary phase. The average crystallite size obtained from XRD decreases (within the experimental uncertainty) with increased Mn concentration. Magnetic measurements have revealed that Zr0.98Mn0.02O2 nanocrystalline sample exhibits both low and room temperature ferromagnetism. The origin of ferromagnetism is attributed to the anionic vacancies created due to Mn doping in ZrO2. Higher Mn concentrations shows superparamagnetism whereas pure ZrO2 displayed diamagnetic behavior. The UV–Vis absorption spectra showed a wide absorption peak at 200–330 nm, and a redshift was observed in the bandgap with an increase in the concentration of Mn2+.

AB - Pure and Mn-doped ZrO2 nanocrystals (Zr1-xMnxO2) with varying Mn concentrations (x = 0.02, 0.04, 0.06, and 0.08) have been synthesized using sol-gel method. The effect of Mn doping concentration on structural, optical and magnetic properties has been investigated. X-ray diffraction data and SAED analysis revealed that all Zr1-xMnxO2 nanocrystals have a tetragonal structure without any secondary phase. The average crystallite size obtained from XRD decreases (within the experimental uncertainty) with increased Mn concentration. Magnetic measurements have revealed that Zr0.98Mn0.02O2 nanocrystalline sample exhibits both low and room temperature ferromagnetism. The origin of ferromagnetism is attributed to the anionic vacancies created due to Mn doping in ZrO2. Higher Mn concentrations shows superparamagnetism whereas pure ZrO2 displayed diamagnetic behavior. The UV–Vis absorption spectra showed a wide absorption peak at 200–330 nm, and a redshift was observed in the bandgap with an increase in the concentration of Mn2+.

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