journal article·2014-07-01Open access

Simultaneous imaging of the ferromagnetic and ferroelectric structure in multiferroic heterostructures

J. Unguris, S. R. Bowden, D. T. Pierce, M. Trassin, R. Ramesh, S.-W. Cheong, S. Fackler, I. Takeuchi

APL Materials· Volume 2· Issue 7

Abstract

By measuring the spin polarization of secondary electrons and the intensity of backscattered electrons generated in a scanning electron microscope, we are able to simultaneously image the ferromagnetic domain structure of a ferromagnetic thin film and the ferroelectric domain structure of the underlying ferroelectric substrate upon which it is grown. Simultaneous imaging allows straightforward, quantitative measurements of the correlations in these complex multiferroic systems. We have successfully imaged domains in CoFe/BFO and Fe/BTO, two systems with very different ferromagnet/ferroelectric coupling mechanisms, demonstrating how this technique provides a new local probe of magneto electric/strictive effects in multiferroic heterostructures.
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Research context

OpenAlex topics: Multiferroics and related materials · Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics

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Affiliations

National Institute of Standards and Technology 1 Center for Nanoscale Science and Technology, , Gaithersburg, Maryland 20899, USA

University of Maryland 2 Maryland Nanocenter, , College Park, Maryland 20742, USA

University of California 3 Department of Materials Science and Engineering, , Berkeley, California 94720, USA

Swiss Federal Institute of Technology Zürich 4 Department of Materials, , 8093 Zürich, Switzerland

University of California 5 Department of Physics, , Berkeley, California 94720, USA

Rutgers University 6 Rutgers Center for Emergent Materials and Department of Physics and Astronomy, , Piscataway, New Jersey 08854, USA

University of Maryland 7 Department of Materials Science and Engineering, , College Park, Maryland 20742, USA

Funding

National Science Foundation

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