Impact of electromagnetic fields and heat on spin transport signals in Y3Fe5O12

Joel Cramer, Lorenzo Baldrati, Andrew Ross, Mehran Vafaee, Romain Lebrun, and Mathias Kläui
Phys. Rev. B 100, 094439 – Published 23 September 2019
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Abstract

Exploring new strategies to perform magnon logic is a key requirement for the further development of magnon-based spintronics. In this paper, we realize a three-terminal magnon transport device to study the possibility of manipulating magnonic spin information transfer in a magnetic insulator via localized magnetic fields and heat generation. The device comprises two parallel Pt wires as well as a Cu center wire that are deposited on the ferrimagnetic insulator Y3Fe5O12. While the Pt wires act as spin current injector and detector, the Cu wire is used to create local magnetostatic fields and additional heat, which impact both the magnetic configuration and the magnons within the Y3Fe5O12 below. We show that these factors can create a nonlocal signal that shows similar features as compared to an electrically induced magnon flow. Furthermore, a modulation of the spin transport signal between the Pt wires is observed, which can be partly explained by thermally excited spin currents of different polarization. Our results indicate a potential way towards the manipulation of nonlocal magnon signals, which could be useful for magnon logic.

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  • Received 18 June 2019
  • Revised 27 August 2019

DOI:https://doi.org/10.1103/PhysRevB.100.094439

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Joel Cramer1,2, Lorenzo Baldrati1, Andrew Ross1,2, Mehran Vafaee1, Romain Lebrun1, and Mathias Kläui1,2,*

  • 1Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany
  • 2Graduate School Materials Science in Mainz, 55128 Mainz, Germany

  • *Klaeui@uni-mainz.de

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Issue

Vol. 100, Iss. 9 — 1 September 2019

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