Field-dependent magnetization of BiFeO3 in ultrathin La0.7Sr0.3MnO3/BiFeO3 superlattice

Here, we report the observation of field-dependent magnetization of BiFeO3 (BFO) in an ultrathin BFO/La0.7Sr0.3MnO3 (LSMO) superlattice using polarized neutron reflectivity (PNR). Our PNR results indicate parallel alignment of magnetization across BFO/LSMO interfaces. The study showed an increase in...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2015-12, Vol.92 (22)
Main Authors: Fitzsimmons, Michael R., Jia, Quanxi X., Singh, Surendra, Chen, A. P., Xiong, J.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
interface magnetic moment
material science
multiferroic and complex oxide hetrostructures
thin films, neutron diffraction, multiferroics
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Summary:Here, we report the observation of field-dependent magnetization of BiFeO3 (BFO) in an ultrathin BFO/La0.7Sr0.3MnO3 (LSMO) superlattice using polarized neutron reflectivity (PNR). Our PNR results indicate parallel alignment of magnetization across BFO/LSMO interfaces. The study showed an increase in average magnetization of the BFO layer on increasing applied magnetic field at 10 K, similar to the ferromagnetic nature of LSMO. We obtained a saturation magnetization of 110 ± 15kA/m(~0.8μB/Fe) for an ultrathin BFO layer (~2 unit cells) sandwiched between ultrathin LSMO layers (~2 unit cells), which is much higher than the canted moment (0.03μB/Fe) in the bulk BFO.
ISSN:1098-0121