Volume 126, Number 5, June 2019
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||05 July 2019|
Large intrinsic magnetization in an epitaxial BiFeO3/NdGaO3system
1 Centre for Nano Science and Engineering, Indian Institute of Science - Bangalore-560012, India
2 International Centre for Materials Science, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research - Bangalore-560064, India
3 Department of Physics, Indian Institute of Science - Bangalore-560012, India
4 Materials Engineering Department, Indian Institute of Science - Bangalore-560012, India
Received: 24 November 2018
Accepted: 28 May 2019
We report a comparative study of the crystal structure and magnetic properties between (001) oriented epitaxial films grown on and substrates without any magnetic parasitic phase. The 15 nm film deposited on a substrate shows substantially high magnetization as compared to an identically thick film deposited on a substrate. Detailed structural analysis revealed that the high magnetization is associated with a monoclinic (Cm) like distortion of the 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.
PACS: 75.85.+t – Magnetoelectric effects, multiferroics
© EPLA, 2019
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