Parallel to anti-parallel switching of magnetic moments in LSMO twisted bilayer membranes on PMN-xPT

ORAL

Abstract

Strain-mediated magnetoelectric (ME) coupling in ferroelectric (FE) and ferromagnetic (FM) heterostructures provides an exciting path towards the development of next-generation memory storage and sensing technologies [1-2], particularly for low-power applications [3-4]. Theory predicts that strain can control magnetic orientation/rotation in heterostructures with noncollinear easy axes [5]. When stacking free-standing membrane thin films of La(1-x)Sr(x)MnO3 (LSMO) onto giant piezoelectric (1-x)Pb(Mg1/3Nb2/3)O3-(x)PbTiO3 (PMN-xPT) substrates, we can vary the twist-angle between individual LSMO layers. By utilizing this twist angle degree of freedom, we attempt to achieve parallel to antiparallel magnetic switching of magnetic moments in the LSMO/PMN-PT heterostructures. We will discuss experiments involving in-operando Polarized Neutron Reflectometry (PNR) which can measure the depth dependence of magnetism. Subsequent fitting/analysis using REFL1D software helps to determine how individual layers of LSMO respond to the strain provided by PMN-xPT, as well as reveal any interactions that may arise between the LSMO membranes.

[1] Adv. Mater. 28, 15-39 (2016). [2] J. Phys. D. Appl. Phys. 51, 243001 (2018). [3] Sci. Adv. 7, eabh2294 (2021). [4] Nat. Comm. 2, 553 (2011). [5] Adv. Theory 4, 2000215 (2021).

*This research is the focus of a grant supplied through the US National Research Council Research Associateship Program (NRC-RAP).

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Presenters

  • Shane Lindemann

    • National Institute of Standards and Technology (NIST)

Authors

  • Shane Lindemann

    • National Institute of Standards and Technology (NIST)

  • Qing Wang

    • ShanghaiTech University

  • Takayasu Hanashima

    • JPARC-MLF

  • Timothy R Charlton

    • Oak Ridge National Laboratory

  • Christy J Kinane

    • ISIS Neutron Source
    • ISIS Neutron Facility, STFC Rutherford Appleton Laboratory

  • Andrew J Caruana

    • ISIS Neutron Source
    • ISIS Neutron Facility, STFC Rutherford Appleton Laboratory

  • Purnima Parvathy Balakrishnan

    • National Institute of Standards and Technology (NIST)

  • Alexander Grutter

    • National Institute of Standards and Technology (NIST)
    • National Institute Standard and Technology

  • Xiaofang Zhai

    • ShanghaiTech University

  • Julie Ann Borchers

    • National Institute of Standards and Technology (NIST)

  • Peter M Gehring

    • National Institute of Standards and Technology (NIST)