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Ultrafast kinetics of the antiferromagnetic-ferromagnetic phase transition in FeRh

Author

Listed:
  • G. Li

    (Radboud University, Institute for Molecules and Materials)

  • R. Medapalli

    (University of California, San Diego, La Jolla
    Lancaster University)

  • J. H. Mentink

    (Radboud University, Institute for Molecules and Materials)

  • R. V. Mikhaylovskiy

    (Lancaster University)

  • T. G. H. Blank

    (Radboud University, Institute for Molecules and Materials)

  • S. K. K. Patel

    (University of California, San Diego, La Jolla)

  • A. K. Zvezdin

    (Moscow Institute for Physics and Technology)

  • Th. Rasing

    (Radboud University, Institute for Molecules and Materials)

  • E. E. Fullerton

    (University of California, San Diego, La Jolla)

  • A. V. Kimel

    (Radboud University, Institute for Molecules and Materials)

Abstract

Understanding how fast short-range interactions build up long-range order is one of the most intriguing topics in condensed matter physics. FeRh is a test specimen for studying this problem in magnetism, where the microscopic spin-spin exchange interaction is ultimately responsible for either ferro- or antiferromagnetic macroscopic order. Femtosecond laser excitation can induce ferromagnetism in antiferromagnetic FeRh, but the mechanism and dynamics of this transition are topics of intense debates. Employing double-pump THz emission spectroscopy has enabled us to dramatically increase the temporal detection window of THz emission probes of transient states without sacrificing any loss of resolution or sensitivity. It allows us to study the kinetics of emergent ferromagnetism from the femtosecond up to the nanosecond timescales in FeRh/Pt bilayers. Our results strongly suggest a latency period between the initial pump-excitation and the emission of THz radiation by ferromagnetic nuclei.

Suggested Citation

  • G. Li & R. Medapalli & J. H. Mentink & R. V. Mikhaylovskiy & T. G. H. Blank & S. K. K. Patel & A. K. Zvezdin & Th. Rasing & E. E. Fullerton & A. V. Kimel, 2022. "Ultrafast kinetics of the antiferromagnetic-ferromagnetic phase transition in FeRh," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30591-2
    DOI: 10.1038/s41467-022-30591-2
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    References listed on IDEAS

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    1. Yuyan Wang & Martin M. Decker & Thomas N. G. Meier & Xianzhe Chen & Cheng Song & Tobias Grünbaum & Weisheng Zhao & Junying Zhang & Lin Chen & Christian H. Back, 2020. "Spin pumping during the antiferromagnetic–ferromagnetic phase transition of iron–rhodium," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    2. Federico Pressacco & Davide Sangalli & Vojtěch Uhlíř & Dmytro Kutnyakhov & Jon Ander Arregi & Steinn Ymir Agustsson & Günter Brenner & Harald Redlin & Michael Heber & Dmitry Vasilyev & Jure Demsar & G, 2021. "Subpicosecond metamagnetic phase transition in FeRh driven by non-equilibrium electron dynamics," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
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    Cited by:

    1. 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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    1. 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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