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Ultrafast magnetization enhancement in metallic multilayers driven by superdiffusive spin current

Author

Listed:
  • Dennis Rudolf

    (Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich)

  • Chan La-O-Vorakiat

    (University of Colorado and NIST)

  • Marco Battiato

    (Uppsala University)

  • Roman Adam

    (Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich)

  • Justin M. Shaw

    (National Institute of Standards and Technology)

  • Emrah Turgut

    (University of Colorado and NIST)

  • Pablo Maldonado

    (Uppsala University)

  • Stefan Mathias

    (University of Colorado and NIST
    University of Kaiserslautern and Research Center OPTIMAS)

  • Patrik Grychtol

    (Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich
    University of Colorado and NIST)

  • Hans T. Nembach

    (National Institute of Standards and Technology)

  • Thomas J. Silva

    (National Institute of Standards and Technology)

  • Martin Aeschlimann

    (University of Kaiserslautern and Research Center OPTIMAS)

  • Henry C. Kapteyn

    (University of Colorado and NIST)

  • Margaret M. Murnane

    (University of Colorado and NIST)

  • Claus M. Schneider

    (Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich)

  • Peter M. Oppeneer

    (Uppsala University)

Abstract

Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is crucial for understanding correlated matter as well as the fundamental limits of ultrafast spin-based electronics. Spin dynamics in magnetic materials can be driven by ultrashort light pulses, resulting in a transient drop in magnetization within a few hundred femtoseconds. However, a full understanding of femtosecond spin dynamics remains elusive. Here we spatially separate the spin dynamics using Ni/Ru/Fe magnetic trilayers, where the Ni and Fe layers can be ferro- or antiferromagnetically coupled. By exciting the layers with a laser pulse and probing the magnetization response simultaneously but separately in Ni and Fe, we surprisingly find that optically induced demagnetization of the Ni layer transiently enhances the magnetization of the Fe layer when the two layer magnetizations are initially aligned parallel. Our observations are explained by a laser-generated superdiffusive spin current between the layers.

Suggested Citation

  • Dennis Rudolf & Chan La-O-Vorakiat & Marco Battiato & Roman Adam & Justin M. Shaw & Emrah Turgut & Pablo Maldonado & Stefan Mathias & Patrik Grychtol & Hans T. Nembach & Thomas J. Silva & Martin Aesch, 2012. "Ultrafast magnetization enhancement in metallic multilayers driven by superdiffusive spin current," Nature Communications, Nature, vol. 3(1), pages 1-6, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms2029
    DOI: 10.1038/ncomms2029
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    Cited by:

    1. Quentin Remy & Julius Hohlfeld & Maxime Vergès & Yann Le Guen & Jon Gorchon & Grégory Malinowski & Stéphane Mangin & Michel Hehn, 2023. "Accelerating ultrafast magnetization reversal by non-local spin transfer," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Xianyang Lu & Zhiyong Lin & Hanqi Pi & Tan Zhang & Guanqi Li & Yuting Gong & Yu Yan & Xuezhong Ruan & Yao Li & Hui Zhang & Lin Li & Liang He & Jing Wu & Rong Zhang & Hongming Weng & Changgan Zeng & Yo, 2024. "Ultrafast magnetization enhancement via the dynamic spin-filter effect of type-II Weyl nodes in a kagome ferromagnet," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Masakazu Matsubara & Takatsugu Kobayashi & Hikaru Watanabe & Youichi Yanase & Satoshi Iwata & Takeshi Kato, 2022. "Polarization-controlled tunable directional spin-driven photocurrents in a magnetic metamaterial with threefold rotational symmetry," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    4. Kyuhwe Kang & Hiroki Omura & Daniel Yesudas & OukJae Lee & Kyung-Jin Lee & Hyun-Woo Lee & Tomoyasu Taniyama & Gyung-Min Choi, 2023. "Spin current driven by ultrafast magnetization of FeRh," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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