We study the impact of Ga ion exposure on the local and nonlocal magnetotransport response in heterostructures of the ferrimagnetic insulator yttrium iron garnet and platinum. In particular, we cut the yttrium iron garnet layer in between two electrically separated wires of platinum using a Ga ion beam and study the ensuing changes in the magnetoresistive response. We find that the nonlocal magnetoresistance signal vanishes when the yttrium iron garnet film between the Pt wires is fully cut, although the local spin Hall magnetoresistance signal remains finite. This observation corroborates the notion that pure spin currents carried by magnons are crucial for the nonlocal magnetotransport effects observed in magnetic insulator/metal nanostructures, while possible transport processes through the substrate can be ruled out.
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24 June 2019
Research Article|
June 24 2019
Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures
Richard Schlitz
;
Richard Schlitz
a)
1
Institut für Festkörper- und Materialphysik, Technische Universität Dresden
, 01062 Dresden, Germany
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Toni Helm;
Toni Helm
2
Max Planck Institute for Chemical Physics of Solids
, 01187 Dresden, Germany
3
Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf
, 01328 Dresden, Germany
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Michaela Lammel;
Michaela Lammel
4
Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), Institute for Metallic Materials
, 01069 Dresden, Germany
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Kornelius Nielsch
;
Kornelius Nielsch
4
Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), Institute for Metallic Materials
, 01069 Dresden, Germany
5
Technische Universität Dresden, Institute of Materials Science
, 01062 Dresden, Germany
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Artur Erbe
;
Artur Erbe
6
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
, 01328 Dresden, Germany
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Sebastian T. B. Goennenwein
Sebastian T. B. Goennenwein
1
Institut für Festkörper- und Materialphysik, Technische Universität Dresden
, 01062 Dresden, Germany
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a)
Electronic mail: richard.schlitz@tu-dresden.de
Appl. Phys. Lett. 114, 252401 (2019)
Article history
Received:
January 25 2019
Accepted:
June 07 2019
Citation
Richard Schlitz, Toni Helm, Michaela Lammel, Kornelius Nielsch, Artur Erbe, Sebastian T. B. Goennenwein; Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures. Appl. Phys. Lett. 24 June 2019; 114 (25): 252401. https://doi.org/10.1063/1.5090209
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