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Engineering Coercivity of SrRuO<sub>3</sub> thin film by SrTiO<sub>3</sub> capping layer

ORAL

Abstract

Oxide heterostructures have has a high potential for spintronics applications due to their well-defined heterointerfaces and vast functionalities. Understanding and utilizing the advantages of oxide spintronics requires effective control of magnetism, such as engineering coercivity (HC). SrRuO3 (SRO) is an itinerant ferromagnet with high tunable electron-electron correlation and spin-orbit coupling. It could be a good candidate for exploring spintronics applications due to the recently discovered exotic topological properties. [1, 2]

Here, we reported our recent result on controlling HC of SRO ultrathin film by a SrTiO3 (STO) capping layer. The film was deposited by pulsed laser deposition. By controlling the thickness and growth oxygen partial pressure of STO capping layer, we can tune the HC of SRO films by an amplitude over 100%. Such an effective modulation of HC is highly related to the oxygen vacancies transferred from STO capping layer to SRO film.

[1] J. Matsuno et al., Sci. Adv. (2016)
[2] L. Wang et al., Nat. Mat. (2018)

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Presenters

  • Eun Kyo Ko

    Center for Correlated Electron Systems (CCES), Institute for Basic Science (IBS)

Authors

  • Eun Kyo Ko

    Center for Correlated Electron Systems (CCES), Institute for Basic Science (IBS)

  • Junsik Mun

    Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University

  • Han-Gyeol Lee

    Center for Correlated Electron Systems (CCES), Institute for Basic Science (IBS)

  • Jinkwon Kim

    Center for Correlated Electron Systems (CCES), Institute for Basic Science (IBS), Department of Physics and Astronomy, Seoul National University

  • Miyoung Kim

    Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University

  • Lingfei Wang

    Center for Correlated Electron Systems (CCES), Institute for Basic Science (IBS), Department of physics and astronomy, Seoul National University, Department of Physics and Astronomy, Seoul National University

  • Tae Won Noh

    Center for Correlated Electron Systems (CCES), Institute for Basic Science (IBS), Department of physics and astronomy, Seoul National University, Department of Physics and Astronomy, Seoul National University