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Ultra-low damping insulating magnetic thin films get perpendicular

Author

Listed:
  • Lucile Soumah

    (Université Paris Saclay)

  • Nathan Beaulieu

    (Université de Bretagne Occidentale)

  • Lilia Qassym

    (Thales Research and Technology, Thales)

  • Cécile Carrétéro

    (Université Paris Saclay)

  • Eric Jacquet

    (Université Paris Saclay)

  • Richard Lebourgeois

    (Thales Research and Technology, Thales)

  • Jamal Ben Youssef

    (Université de Bretagne Occidentale)

  • Paolo Bortolotti

    (Université Paris Saclay)

  • Vincent Cros

    (Université Paris Saclay)

  • Abdelmadjid Anane

    (Université Paris Saclay)

Abstract

A magnetic material combining low losses and large perpendicular magnetic anisotropy (PMA) is still a missing brick in the magnonic and spintronic fields. We report here on the growth of ultrathin Bismuth doped Y3Fe5O12 (BiYIG) films on Gd3Ga5O12 (GGG) and substituted GGG (sGGG) (111) oriented substrates. A fine tuning of the PMA is obtained using both epitaxial strain and growth-induced anisotropies. Both spontaneously in-plane and out-of-plane magnetized thin films can be elaborated. Ferromagnetic Resonance (FMR) measurements demonstrate the high-dynamic quality of these BiYIG ultrathin films; PMA films with Gilbert damping values as low as 3 × 10−4 and FMR linewidth of 0.3 mT at 8 GHz are achieved even for films that do not exceed 30 nm in thickness. Moreover, we measure inverse spin hall effect (ISHE) on Pt/BiYIG stacks showing that the magnetic insulator’s surface is transparent to spin current, making it appealing for spintronic applications.

Suggested Citation

  • Lucile Soumah & Nathan Beaulieu & Lilia Qassym & Cécile Carrétéro & Eric Jacquet & Richard Lebourgeois & Jamal Ben Youssef & Paolo Bortolotti & Vincent Cros & Abdelmadjid Anane, 2018. "Ultra-low damping insulating magnetic thin films get perpendicular," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05732-1
    DOI: 10.1038/s41467-018-05732-1
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