Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques
Neumann L, Meinert M (2018)
AIP Advances 8(9): 095320.
Zeitschriftenaufsatz
| Veröffentlicht | Englisch
Download
![Open access file OA](https://pub.uni-bielefeld.de/images/access_open.png)
Autor*in
Abstract / Bemerkung
Harmonic Hall voltage measurements are a wide-spread quantitative technique for the measurement of spin-orbit induced effective fields in heavy-metal/ferromagnet heterostructures. In the vicinity of the voltage pickup lines in the Hall bar, the current is inhomogeneous, which leads to a hitherto not quantified reduction of the effective fields and derived quantities, such as the spin Hall angle or the spin Hall conductivity. Here we present a thorough analysis of the influence of the aspect ratio of the voltage pickup lines to current channel widths on the apparent spin Hall angle. Experiments were performed with Hall bars with a broad range of aspect ratios and a substantial reduction of the apparent spin Hall angle is already seen in Hall crosses with an aspect ratio of 1:1. Our experimental results are confirmed by finite-element simulations of the current flow.
Erscheinungsjahr
2018
Zeitschriftentitel
AIP Advances
Band
8
Ausgabe
9
Art.-Nr.
095320
eISSN
2158-3226
Finanzierungs-Informationen
Open-Access-Publikationskosten wurden durch die Deutsche Forschungsgemeinschaft und die Universität Bielefeld gefördert.
Page URI
https://pub.uni-bielefeld.de/record/2931317
Zitieren
Neumann L, Meinert M. Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques. AIP Advances. 2018;8(9): 095320.
Neumann, L., & Meinert, M. (2018). Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques. AIP Advances, 8(9), 095320. doi:10.1063/1.5037391
Neumann, Lukas, and Meinert, Markus. 2018. “Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques”. AIP Advances 8 (9): 095320.
Neumann, L., and Meinert, M. (2018). Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques. AIP Advances 8:095320.
Neumann, L., & Meinert, M., 2018. Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques. AIP Advances, 8(9): 095320.
L. Neumann and M. Meinert, “Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques”, AIP Advances, vol. 8, 2018, : 095320.
Neumann, L., Meinert, M.: Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques. AIP Advances. 8, : 095320 (2018).
Neumann, Lukas, and Meinert, Markus. “Influence of the Hall-bar geometry on harmonic Hall voltage measurements of spin-orbit torques”. AIP Advances 8.9 (2018): 095320.
Alle Dateien verfügbar unter der/den folgenden Lizenz(en):
Copyright Statement:
Dieses Objekt ist durch das Urheberrecht und/oder verwandte Schutzrechte geschützt. [...]
Volltext(e)
Name
1.5037391.meinert.pdf
953.24 KB
Access Level
![Open access file OA](https://pub.uni-bielefeld.de/images/access_open.png)
Zuletzt Hochgeladen
2019-09-06T09:19:02Z
MD5 Prüfsumme
6bb9b0f77216629d3dcd8d84640ef036
Export
Markieren/ Markierung löschen
Markierte Publikationen
Web of Science
Dieser Datensatz im Web of Science®Suchen in