Eur. Phys. J. B (2018) 91: 287
https://doi.org/10.1140/epjb/e2018-90382-3

Regular Article

Structural, optical and magnetic properties of nanophase NiWO₄ for potential applications

¹ Nanoscience Research Centre (NSRC), Department of Physics, Nirmala College, Muvattupuzha 686661, Kerala, India
² Department of Physics, Newman College, Thodupuzha 685584, Kerala, India
³ Department of Applied Science and Humanities, Thejus Engineering College, Thrissur 680584, Kerala, India
⁴ Department of Physics, Vimala College, Thrissur 680009, Kerala, India

^a e-mail: nanoncm@gmail.com

Received: 10 June 2018
Received in final form: 14 September 2018
Published online: 19 November 2018

Abstract

Nanocrystalline NiWO₄ powder samples were synthesized by direct-chemical precipitation method. Thermal stability of the sample was studied by thermo gravimetric and differential thermal analysis. Structural characterization of NiWO₄ nanoparticles was done with X-ray diffraction and field emission scanning electron microscopy. Elemental analysis of the samples were done with energy dispersive X-ray spectroscopy. Vibration modes of as prepared samples were analysed using Fourier transform infrared spectroscopy and Raman spectroscopy. Optical properties of the samples were explored using UV-vis spectroscopy and photoluminescence (PL) spectroscopy. Magnetic properties of NiWO₄ nanoparticles were analysed using vibrating sample magnetometer (VSM). Effect of calcination temperature on structural, vibrational, optical and magnetic properties of the NiWO₄ samples were also investigated. The results obtained from various characterization techniques found that NiWO₄ nanoparticle have the potential use in light emitting diodes (LEDs), biomedical and sensing applications.