Madolappa, Shivanand and Anupama, AV and Jaschin, PW and Varma, KBR and Sahoo, B (2016) Magnetic and ferroelectric characteristics of Gd3+ and Ti4+ co-doped BiFeO3 ceramics. In: BULLETIN OF MATERIALS SCIENCE, 39 (2). pp. 593-601.
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Abstract
Polycrystalline BiFeO and BiGdFeTi (x) O (3) (x = 0, 0.01, 0.05 and 0.1) samples were synthesized by solid-state reaction route. Structural, magnetic and ferroelectric properties of these samples were investigated. X-ray powder diffraction (XRD) results confirmed the presence of a significant amount of BiFe impurity phase in the undoped BiFeO sample. Mossbauer spectroscopy studies corroborated the XRD studies to confirm the presence of impurity phase. We have observed that gadolinium (Gd) and titanium (Ti) doping, respectively, on Bi and Fe sites facilitated a significant reduction in the impurity phase formation in BiFeO. Interestingly, Gd-doping significantly reduced the impurity phase formation as compared to the undoped BiFeO sample. This impurity phase formation was further overcome by doping higher (x 0.05) amounts of Ti in BiFeO. The crystallographic site occupancies of Gd and Ti were confirmed by Rietveld refinement of XRD data, Mossbauer spectroscopy and magnetization measurements. An enhancement in ferromagnetic properties along with moderate ferroelectric properties have been observed after co-doping. There was an increasing trend in remnant polarization (P ) with the increase in Ti concentration besides an improvement in the characteristic saturation magnetization. Our results demonstrate that Gd and Ti doping could be used to enhance multifunctional properties of BiFeO ceramics to enable them as potential material for various devices.
| Item Type: | Journal Article |
|---|---|
| Publication: | BULLETIN OF MATERIALS SCIENCE |
| Publisher: | INDIAN ACAD SCIENCES |
| Additional Information: | Copy right for this article belongs to the INDIAN ACAD SCIENCES, C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA |
| Keywords: | Multiferroic; bismuth ferrite; Rietveld analysis; Mossbauer spectroscopy |
| Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
| Date Deposited: | 11 Jun 2016 07:25 |
| Last Modified: | 11 Jun 2016 07:25 |
| URI: | http://eprints.iisc.ac.in/id/eprint/53902 |
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