Arora, Manisha and Chauhan, Sunil and Sati, P. C. and Kumar, Manoj and Chhoker, Sandeep and Kotnala, R. K. (2014) Spin-phonon coupling and improved multiferroic properties of Zr substituted BiFeO3 nanoparticles. Journal of Materials Science: Materials in Electronics, 25 (10). pp. 4286-4299. ISSN 0957-4522

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Zr substituted BiFeO3 (BiFe1-xZrxO3 with x = 0.03, 0.07, 0.10 and 0.15) nanoparticles were synthesized by sol-gel method. Powder X-ray diffraction studies showed rhombohedral crystal structure for x = 0.03-0.10 samples. The substitution induced structural transformation from rhombohedral to triclinic phase has been observed for x = 0.15. Raman analysis confirmed this structural transformation as also the distortion induced spin phonon coupling. Enhanced magnetic behaviour with saturation magnetization of 7.62 emu/g has been observed in x = 0.07 sample. The dielectric measurements indicated the strong magneto-electric coupling in the range of Neel temperature. The impedance study over a wider frequency and temperature range suggests decrease in conductivity in the samples with increasing Zr concentration. UV-Vis diffuse reflectance spectra shows the strong absorption of visible light suggesting the band gap values from 2.22 to 2.15 eV corresponding to x = 0.03-0.15 compositions.

Item Type: Article
Additional Information: Copyright for this article belongs to M/S Springer Verlag.
Subjects: Engineering
Materials Science
Depositing User: Dr. Rajpal Walke
Date Deposited: 05 Nov 2015 10:32
Last Modified: 05 Nov 2015 10:32

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