Low-dimensional magnetic structure of ErFeO3 epitaxial ultrathin films

ORAL

Abstract

Ferrite material ReFeO3, which is composed of rare earth elements (Re) and Fe generally has an orthorhombic structure in bulk form and show various electronic, magnetic properties. [1-3] One of the examples, ErFeO3, which has strong spin-orbit coupling, has various magnetic phases i.e., Antiferromagnetic phase transition at TN ~ 640 K, spin reorientation between 87-97 K, and long range ordering of Er3+ moment 4.5 K. This makes ErFeO3 suitable testbed for magnetic modulation. Especially in an ultrathin scale, material has only a few numbers of out-of plane direction layers and it gives dimensional effect in addition to the strain effect. For instance, we can easily find significant effect of dimension on SrRuO3 system. Electronic, magnetic phase transition and coupling between degrees of freedom is induced by dimensional effect. [5-7] We succefully fabricated ultrathin ErFeO3 film by using pulsed laser epitaxy to check the dimensional effect on magnetism. Magnetic structure of 2 nm ErFeO3 thin film in low temperature range is confirmed by polarized neutron reflectivity. As a result, this research on magnetic ultrathin film ErFeO3 will enhance our understanding on generic magnetic property of low-dimensional oxide materials in the fundamental basis. Furthermore, it can contribute to research on magnetic insulator for spintronic devices. [8-13]

* National Research Foundation NRF-2021R1A2C2011340

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Publication: [1] S. Acharya et al., Mater. Lett. 64, 3, 415-418 (2010)
[2] M. Idrees et al., Acta. Mater. 59(4), 1338-1345 (2011)
[3] C. Zhang et al., J. Alloys Compd. 665, 152-157 (2016)
[4] J. W. Seo et al., J. Phys. Condens. Matter. 20, 264014 (2008)
[5] S. G. Jeong et al., Phys. Rev. Lett. 124, 026401 (2020)
[6] S. G. Jeong et al., Adv. Sci. 10, 2300012 (2023)
[7] S. G. Jeong et al., Small. Early view, 2303176 (2023)
[8] H. Shen et al., Appl. Phys. Lett. 103, 192404 (2013)
[9] T. F. Nova et al., Nat. Phys. 13, 132 (2017)
[10] L. J. Cornelissen et al., Nat. Phys. 11, 1022-1026 (2015)
[11] L. J. Cornelissen et al., Phys. Rev. Lett. 120, 097702 (2018)
[12] R. Lebrun et al., Nature. 561, 222-225 (2018)
[13] Eric Parsonnet et al., Phys. Rev. Lett. 129, 087601 (2022)

Presenters

  • Jin Young Oh

    Sungkyunkwan University, South Korea, Sungkyunkwan University, SUNGKYUNKWAN UNIVERSITY

Authors

  • Jin Young Oh

    Sungkyunkwan University, South Korea, Sungkyunkwan University, SUNGKYUNKWAN UNIVERSITY

  • Woo Seok Choi

    Sungkyunkwan University, South Korea, Sungkyunkwan University, Department of Physics, Sungkyunkwan University

  • Valeria Lauter

    Oak Ridge National Lab, OakRidge National Laboratory

  • Sungkyun Park

    Pusan Natl Univ

  • SEUNG GYO JEONG

    University of Minnesota, Twin Cities

  • Sehwan Song

    Pusan Natioanl University, South Korea, Korea Research Institute of Standards & Science