Structural investigations of (Mn, Dy) co-doped ZnO nanocrystals using X-ray absorption studies

N. Tiwari; S. Kumar; A. K. Ghosh; S. Chatterjee; S. N. Jha; D. Bhattacharyya

doi:10.1039/C7RA10748J

Structural investigations of (Mn, Dy) co-doped ZnO nanocrystals using X-ray absorption studies

N. Tiwari,^ab S. Kumar,^c A. K. Ghosh,

^d S. Chatterjee,^e S. N. Jha^a and D. Bhattacharyya

*^a

Author affiliations

* Corresponding authors

^a Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai-400 085, India
E-mail: dibyendu@barc.gov.in

^b Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094, India

^c Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-0046, Japan

^d Materials Research Laboratory, Department of Physics, Banaras Hindu University, Varanasi-221 005, India

^e Department of Physics, Indian Institute of Technology, Banaras Hindu University, Varanasi-221 005, India

Abstract

(Mn, Dy)-doped ZnO nanocrystals with Mn-concentrations of 0 and 2% and Dy-concentrations of 0, 0.5%, 1%, 2%, 4% and 6% have been prepared using a sol–gel technique. Preliminary structural characterisations of the samples have been carried out using X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Fourier Transformed Infra-red (FTIR) spectroscopy. Changes in the luminescence characteristics of the samples due to rare earth doping have been investigated by Photoluminescence (PL) measurement and its effect on the magnetic properties of the samples has also been studied. The local structure at the host (Zn) and dopant (Mn and Dy) sites of the samples have been thoroughly investigated by synchrotron based X-ray absorption spectroscopy (XAS), which is an element specific microscopic technique comprising both X-ray near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) measurements and the magnetic properties of the samples have been explained in light of the findings from XANES and EXAFS.

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https://doi.org/10.1039/C7RA10748J

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Paper

Submitted

28 Sep 2017

Accepted

07 Dec 2017

First published

15 Dec 2017

This article is Open Access

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RSC Adv., 2017,7, 56662-56675

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Structural investigations of (Mn, Dy) co-doped ZnO nanocrystals using X-ray absorption studies

N. Tiwari, S. Kumar, A. K. Ghosh, S. Chatterjee, S. N. Jha and D. Bhattacharyya, RSC Adv., 2017, 7, 56662 DOI: 10.1039/C7RA10748J

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Structural investigations of (Mn, Dy) co-doped ZnO nanocrystals using X-ray absorption studies

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Structural investigations of (Mn, Dy) co-doped ZnO nanocrystals using X-ray absorption studies

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