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Large intrinsic magnetization in an epitaxial BiFeO3/NdGaO3 system

Sil, Anomitra and Negi, Devendra S and Naik, Mit H and Jain, Manish and Datta, Ranjan and Ranjan, Rajeev and Kumar, P S Anil (2019) Large intrinsic magnetization in an epitaxial BiFeO3/NdGaO3 system. In: EPL, 126 (5).

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Official URL: https://dx.doi.org/10.1209/0295-5075/126/57003


We report a comparative study of the crystal structure and magnetic properties between (001) oriented epitaxial BiFeO3 films grown on NdGaO3 and SrTiO3 substrates without any magnetic parasitic phase. The 15nm BiFeO3 film deposited on a NdCaO3 substrate shows substantially high magnetization (similar to 250 emu/cc) as compared to an identically thick BiFeO3 film (similar to 100 emu/cc) deposited on a SrTiO3 substrate. Detailed structural analysis revealed that the high magnetization is associated with a monoclinic (Cm) like distortion of the BiFeO3 crystal structure. We corroborated our experimental findings with first principles density functional theory calculations which suggested a saturation magnetization (266 emu/cc) close to the experimentally obtained one and a ferromagnetic ground state with the high spin moment in the Cm phase.

Item Type: Journal Article
Publication: EPL
Additional Information: copyright for this article belongs to IOP PUBLISHING LTD
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 29 Aug 2019 09:48
Last Modified: 29 Aug 2019 09:48
URI: http://eprints.iisc.ac.in/id/eprint/63333

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