Controlling the exchange bias in multiferroic BiFeO3 and NiFe bilayers

Joonghoe Dho; M. G. Blamire

doi:10.1063/1.3240338

Controlling the exchange bias in multiferroic BiFeO₃ and NiFe bilayers

Joonghoe Dho, M. G. Blamire

Department of Physics

University of Cambridge

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

We have investigated how the exchange bias and coercive field of NiFe/ BiFeO₃ bilayers on (001) SrTiO₃ is affected by changes in substrate temperature, oxygen pressure, and film thickness for BiFeO₃ deposition. Our results suggest that the exchange bias and the coercive field are mainly dependent on the roughness at the interface because (001) BiFeO ₃ has a compensated surface. The change in exchange bias associated with training effect and/or time relaxation, which are probably caused by a rearrangement of BiFeO₃ domains under magnetic fields opposite to the initial magnetic field, may limit future spintronic applications of BiFeO ₃.

Original language	English
Article number	073914
Journal	Journal of Applied Physics
Volume	106
Issue number	7
DOIs	https://doi.org/10.1063/1.3240338
State	Published - 2009

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abstract = "We have investigated how the exchange bias and coercive field of NiFe/ BiFeO3 bilayers on (001) SrTiO3 is affected by changes in substrate temperature, oxygen pressure, and film thickness for BiFeO3 deposition. Our results suggest that the exchange bias and the coercive field are mainly dependent on the roughness at the interface because (001) BiFeO 3 has a compensated surface. The change in exchange bias associated with training effect and/or time relaxation, which are probably caused by a rearrangement of BiFeO3 domains under magnetic fields opposite to the initial magnetic field, may limit future spintronic applications of BiFeO 3.",

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Controlling the exchange bias in multiferroic BiFeO₃ and NiFe bilayers

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