Weyl semimetal thin film Eu<sub>1-x</sub>Sm<sub>x</sub>TiO<sub>3</sub> on LSAT (001): field-polarized long-range order and interfacial ferromagnetism

ORAL

Abstract

EuTiO3 thin films have recently been reported to manifest complex magnetotransport phenomena upon carrier substitution, ranging from symmetry breaking anisotropic magnetoresistance to nonmonotonic anomalous Hall transport. Here we investigate the interplay between magnetism and transport behavior by studying the evolution of magnetic order in thin film samples of biaxially strained and electron-doped EuTiO3 under an applied field. Neutron diffraction reveals that G-type antiferromagnetism is suppressed with the onset of in-plane field-polarized ferromagnetism for insulating, semimetallic, and metallic samples. However, polarized neutron reflectometry further reveals the onset of interfacial ferromagnetism at low fields far below the fully polarized state. The relationship between magnetic order and electron transport behavior associated with the Weyl semimetal phase in these films will be discussed.

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Presenters

  • Zach Porter

    • University of California, Santa Barbara

Authors

  • Zach Porter

    • University of California, Santa Barbara

  • Ryan Need

    • National Institute of Standards and Technology
    • Materials Science and Engineering, University of Florida
    • NIST Center for Neutron Research

  • Kaveh Ahadi

    • University of California, Santa Barbara

  • Yang Zhao

    • NIST Center of Neutron Research, National Institute of Standards and Technology
    • NIST Center for Neutron Research
    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • NIST

  • Zhijun Xu

    • NIST and University of Maryland
    • National Institute of Standards and Technology
    • (NCNR, National Institute of Standards and Technology)
    • NIST Center for Neutron Research

  • Brian James Kirby

    • National Institute of Standards and Technology
    • NIST Center for Neutron Research
    • NCNR, National Institute of Standards and Technology

  • Jeffrey Lynn

    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • NIST
    • Center for Neutron Research, National Institute of Standards and Technology
    • National Institute of Standards and Technology
    • NIST Center for Neutron Research

  • Susanne Stemmer

    • Materials, UC Santa Barbara
    • University of California, Santa Barbara
    • Materials, University of California, Santa Barbara

  • Stephen Wilson

    • University of California, Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • Materials Engineering, University of California, Santa Barbara
    • California NanoSystems Institute/Materials, University of California, Santa Barbara