Strain-tuning of magnetic order and short-range structural correlations in EuTiO<sub>3</sub>

ORAL

Abstract

Stoichiometric EuTiO3 is an antiferromagnetic insulator that lies close to the boundary between antiferromagnetic and ferromagnetic order [1]. It is also an incipient ferroelectric, with a soft polar phonon frequency of around 75 cm-1 at zero temperature [2]. It is known that both ferroelectric and ferromagnetic order can be induced in thin films under biaxial tensile strain [3], while synchrotron X-ray diffraction has revealed modulated antiferrodistortive order and short-range antiferroelectric correlations in bulk crystals [4]. Here we present a comprehensive magnetization and diffuse X-ray scattering study of the influence of uniaxial deformation on the magnetic and structural properties of bulk EuTiO3, both in the elastic and plastic deformation regimes.

[1] T. Katsufuji and Y. Tokura, Phys. Rev. B 60, R15021 (1999)

[2] S. Kamba et al., Europhys. Lett. 80, 27002 (2007)

[3] June Hyuk Lee et al., Nature 466, 954 (2010)

[4] Jong-Woo Kim et al., Phys. Rev. Lett. 110, 027201 (2013)

*Work funded by the U.S. Department of Energy through the University of Minnesota Center for Quantum Materials, under Grant No. DE-SC0016371, and by the Croatian Science Foundation under UIP-2020-02-9494.

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Publication:

Presenters

  • Dayu Zhai

    • University of Minnesota

Authors

  • Dayu Zhai

    • University of Minnesota

  • Xing He

    • University of Pennsylvania
    • University of Minnesota

  • Chiou Yang Tan

    • University of Minnesota

  • Issam Khayr

    • University of Minnesota Twin Cities
    • University of Minnesota

  • Suchismita Sarker

    • CHESS

  • Damjan Pelc

    • University of Zagreb

  • Martin Greven

    • University of Minnesota
    • University of Minnesota Twin Cities