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Publication Type : Journal Article
Publisher : Elsevier
Source : Journal of Magnetism and Magnetic Materials 2016, 401, 180–187. https://doi.org/10.1016/j.jmmm.2015.10.035.
Url : https://www.sciencedirect.com/science/article/abs/pii/S0304885315306697
Campus : Amritapuri
School : School for Sustainable Futures
Year : 2016
Abstract : BiFeO3 (BFO) thin films with uniform thickness of ~200 nm were prepared by the sol–gel assisted spin coating method. Different grain size distributions in the as-grown BFO films were then induced by varying the annealing temperature between 525 and 600 °C. It is found that the grain size distribution become wider as the annealing temperature increases. All the films showed a well-saturated magnetization (M) versus magnetic field (H) hysteresis loops at 300 K. A strong dependence of M on the grain size distribution is observed. An optimal grain size distribution with average grain size ~90 nm is responsible for high M in the BFO films. The non-saturated M–H loops obtained at 10 K suggest the spin glass behaviour of BFO films. The zero field cooled (ZFC) and field cooled (FC) magnetization curves shows split at 300 K and a cusp at ~50 K in the ZFC curve, which further confirms the spin glass state of polycrystalline BFO thin films.
Cite this Research Publication : Sharma, S.; Saravanan, P.; Pandey, O. P.; Vinod, V. T. P.; Černík, M.; Sharma, P. "Magnetic Behaviour of Sol–Gel Driven BiFeO 3 Thin Films with Different Grain Size Distribution". Journal of Magnetism and Magnetic Materials 2016, 401, 180–187. https://doi.org/10.1016/j.jmmm.2015.10.035.