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  Complex Terahertz and Direct Current Inverse Spin Hall Effect in YIG/Cu1-xIrx Bilayers Across a Wide Concentration Range

Cramer, J., Seifert, T., Kronenberg, A., Fuhrmann, F., Jakob, G., Jourdan, M., et al. (2018). Complex Terahertz and Direct Current Inverse Spin Hall Effect in YIG/Cu1-xIrx Bilayers Across a Wide Concentration Range. Nano Letters, 18(2), 1064-1069. doi:10.1021/acs.nanolett.7b04538.

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 Urheber:
Cramer, Joel1, 2, Autor
Seifert, Tom3, Autor           
Kronenberg, Alexander1, Autor
Fuhrmann, Felix1, Autor
Jakob, Gerhard1, Autor
Jourdan, Martin1, Autor
Kampfrath, Tobias3, 4, Autor           
Kläui, Mathias1, 2, Autor
Affiliations:
1Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany, ou_persistent22              
2Graduate School of Excellence Materials Science in Mainz, 55128 Mainz, Germany, ou_persistent22              
3Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
4Department of Physics, Freie Universität Berlin, 14195 Berlin, Germany, ou_persistent22              

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Schlagwörter: Condensed Matter, Materials Science, cond-mat.mtrl-sci
 Zusammenfassung: We measure the inverse spin Hall effect of Cu1-xIrx thin films on yttrium iron garnet over a wide range of Ir concentrations (0.05 ≤ x ≤ 0.7). Spin currents are triggered through the spin Seebeck effect, either by a DC temperature gradient or by ultrafast optical heating of the metal layer. The spin Hall current is detected by, respectively, electrical contacts or measurement of the emitted THz radiation. With both approaches, we reveal the same Ir concentration dependence that follows a novel complex, non-monotonous behavior as compared to previous studies. For small Ir concentrations a signal minimum is observed, while a pronounced maximum appears near the equiatomic composition. We identify this behavior as originating from the interplay of different spin Hall mechanisms as well as a concentration-dependent variation of the integrated spin current density in Cu1-xIrx. The coinciding results obtained for DC and ultrafast stimuli show that the studied material allows for efficient spin-to-charge conversion even on ultrafast timescales, thus enabling a transfer of established spintronic measurement schemes into the terahertz regime.

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Sprache(n): eng - English
 Datum: 2017-09-062018-01-192017-10-242018-01-232018-02-14
 Publikationsstatus: Erschienen
 Seiten: 6
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Art des Abschluß: -

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Projektname : TERAMAG - Ultrafast spin transport and magnetic order controlled by terahertz electromagnetic pulses
Grant ID : 681917
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)

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Titel: Nano Letters
  Kurztitel : Nano Lett.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, DC : American Chemical Society
Seiten: 6 Band / Heft: 18 (2) Artikelnummer: - Start- / Endseite: 1064 - 1069 Identifikator: ISSN: 1530-6984
CoNE: https://pure.mpg.de/cone/journals/resource/110978984570403