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Spin-current across the metamagnetic transition in FeRh films as measured with THz emission spectroscopy

ORAL

Abstract

THz emission from heterostructures of ferromagnetic (FM) and noble metal (NM) layers is attributed to spin-charge conversion at the FM/NM interface, yet similar effects in bare magnetic thin films are not fully understood. Here we perform THz emission spectroscopy on thin films of FeRh, which is well known to undergo an antiferromagnetic to ferromagnetic phase transition around room temperature. The emitted THz field is observed to have a strong temperature dependence and a power-law dependence on the incident pump pulse fluence. Combined with the knowledge of the spin Hall angle, we extract a temperature dependent spin current across the metamagnetic transition.

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Presenters

  • Yinchuan Lv

    Material Science and Engineering, University of Illinois at Urbana-Champaign

Authors

  • Yinchuan Lv

    Material Science and Engineering, University of Illinois at Urbana-Champaign

  • Hilal Saglam

    Materials Science Division, Argonne National Laboratory, Applied Physics, Yale University, Department of Applied Physics, Yale University, Yale University

  • Soho shim

    Material Science and Engineering, University of Illinois at Urbana-Champaign

  • Jonathan Gibbons

    Material Science and Engineering, University of Illinois at Urbana-Champaign, Materials Science and Engineering, University of Illinois, Urbana-Champaign, Materials Science, Argonne National Laboratory, Physics, University of California, San Diego, Materials Science and Engineering, University of Illinois at Urbana-Champaign

  • Axel F Hoffmann

    University of Illinois at Urbana-Champaign, Material Science and Engineering, University of Illinois at Urbana-Champaign, Materials Science and Engineering, University of Illinois, Urbana-Champaign, Argonne National Laboratory, Materials Science and Engineering, University of Illinois at Urbana-Champaign

  • Nadya Mason

    University of Illinois at Urbana-Champaign, Material Science and Engineering, University of Illinois at Urbana-Champaign, Physics, University of Illinois at Urbana-Champaign

  • Fahad Mahmood

    University of Illinois at Urbana-Champaign, Department of Physics, University of Illinois at Urbana-Champaign, Material Science and Engineering, University of Illinois at Urbana-Champaign, Physics, University of Illinois at Urbana-Champaign