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First principal investigation of structural, morphological, optoelectronic and magnetic characteristics of sprayed Zn: Fe

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Academic year: 2021

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Optik

Volume 219, October 2020, 165303

First principal investigation of structural, morphological, optoelectronic and magnetic

characteristics of sprayed Zn: Fe

2

O

3

thin films

Rihab BenAyedaMejdaAjiliaJorge M.GarciabAichaZiouchecJose Luis CostaKramerbNajoua KamounTurkia

https://doi.org/10.1016/j.ijleo.2020.165303Get rights and content

Abstract

Undoped and Zn-doped Fe2O3 thin films were grown through spray pyrolysis. Zinc doping effect on the physical properties was investigated in detail. X-ray diffraction analysis confirms that all the Fe2O3 thin films showed a rhombohedral structure. The surface morphological study shows an interesting dendrite structure. The estimated band gaps energies were increased from 2.13 to 2.21 eV for indirect transition and from 1.80 to 1.85 eV for direct transition as function of doping ratio which was increased from 2 to 8 at. % Zn. The resistivity value (ρ) of un-doped Fe2O3 thin film is 6.06 × 104 Ω. cm and as adding Zn ions, ρ consequently decreased to 52 Ω. cm for 6 at. % Zn-doped Fe2O3 thin films. Vibrating sample magnetometer (VSM) measurements showed an increase of the saturation magnetization with the Zn2+ insertion. Further, a ferromagnetic behavior was observed.

Keywords :

Ferromagnetic ; Semiconductor; Fe2O3; Zinc doping; Low resistivity

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