Evidence of the Multiferroic Character of the EuO<sub>1-x </sub>-BaTiO<sub>3</sub> Heterojunction

ORAL

Abstract

EuO1-x combines several interesting properties: large magneto-optical effects, colossal magneto-resistance, and enhanced Curie temperature due to bound magnetic polarons. EuO1-x is also one of a very few ferromagnetic insulators and, as an ultra thin film, very sensitive to interface effects. Investigation into the affect of ferroelectric substrates on the ferromagnetic properties of EuO1-x can provide deep insights into how one can manipulate magnetism by changing interface charge populations. Utilizing pulsed laser deposition, a thin film (20nm) of ferroelectric BaTiO3 was grown on top of a thin film (15nm) of ferromagnetic EuO1-x. X-ray diffraction indicates the presence of high quality crystalline thin films of EuO1-x and BaTiO3. Magneto optical Kerr effect (MOKE) spectroscopy and magneto-resistance measurements indicate a temperature dependent signature of anti-ferromagnetic magnetoelectric coupling of the ferroelectric/ferromagnetic heterostructure. This study sheds new light on the modulation of magnetoelectric coupling at a device interface.

*This research was supported by the National Science Foundation, through Grant Nos. NSF-ECCS 1740136 and 1508541, as well as by the NCORE, a wholly owned subsidiary of the Semiconductor Research Corporation (SRC).

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Presenters

  • Syed Qamar Abbas Qamar Shah

    • Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588- 0299
    • Physics and Astronomy, The University of Nebraska-Lincoln

Authors

  • Syed Qamar Abbas Qamar Shah

    • Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588- 0299
    • Physics and Astronomy, The University of Nebraska-Lincoln

  • Gaurab Rimal

    • Rutgers University
    • Physics and Astronomy, Rutgers University, Piscataway

  • Guanhua Hao

    • Department of Physics and Astronomy, University of Nebraska-Lincoln
    • Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588- 0299
    • Physics, University of Nebraska - Lincoln
    • Physics and Astronomy, The University of Nebraska-Lincoln

  • Andrew J Yost

    • Department of Physics and Astronomy, University of Nebraska-Lincoln
    • Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588- 0299
    • Physics, University of Nebraska - Lincoln
    • Physics and Astronomy, The University of Nebraska-Lincoln

  • Jinke Tang

    • University of Wyoming
    • Physics and Astronomy, The University of Wyoming-Laramie

  • Peter A Dowben

    • Department of Physics and Astronomy, University of Nebraska-Lincoln
    • Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588- 0299
    • Physics and Astronomy, University of Nebraska-Lincoln
    • Physics, University of Nebraska - Lincoln
    • Physics and Astronomy, The University of Nebraska-Lincoln