Fritz, Katharina ; Wimmer, Sebastian ; Ebert, Hubert ; Meinert, Markus (2018)
Large spin Hall effect in an amorphous binary alloy.
In: Physical Review B, 98 (9)
doi: 10.1103/physrevb.98.094433
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We investigate the spin Hall effect of W-Hf thin films, which exhibit a phase transition from a segregated phase mixture to an amorphous alloy below 70% W. The spin Hall angle was determined with a planar harmonic Hall voltage technique. Due to the accompanying jump in resistivity, the spin Hall angle shows a pronounced maximum at the composition of the phase transition. The spin Hall conductivity does, however, reduce from W to Hf with a weak discontinuity across the phase transition. The maximum spin Hall angle of θSH=−0.20 is obtained for amorphous W0.7Hf0.3. A detailed comparison with spin Hall conductivities calculated from first principles for hcp, fcc, and bcc solid solutions provides valuable insight into the alloying physics of this binary system.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Fritz, Katharina ; Wimmer, Sebastian ; Ebert, Hubert ; Meinert, Markus |
| Art des Eintrags: | Bibliographie |
| Titel: | Large spin Hall effect in an amorphous binary alloy |
| Sprache: | Englisch |
| Publikationsjahr: | 28 September 2018 |
| Verlag: | APS Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 98 |
| (Heft-)Nummer: | 9 |
| DOI: | 10.1103/physrevb.98.094433 |
| Kurzbeschreibung (Abstract): | We investigate the spin Hall effect of W-Hf thin films, which exhibit a phase transition from a segregated phase mixture to an amorphous alloy below 70% W. The spin Hall angle was determined with a planar harmonic Hall voltage technique. Due to the accompanying jump in resistivity, the spin Hall angle shows a pronounced maximum at the composition of the phase transition. The spin Hall conductivity does, however, reduce from W to Hf with a weak discontinuity across the phase transition. The maximum spin Hall angle of θSH=−0.20 is obtained for amorphous W0.7Hf0.3. A detailed comparison with spin Hall conductivities calculated from first principles for hcp, fcc, and bcc solid solutions provides valuable insight into the alloying physics of this binary system. |
| Zusätzliche Informationen: | Art.No.: 094433 |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP) 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP) > Neue Materialien Elektronik |
| Hinterlegungsdatum: | 14 Jan 2022 10:45 |
| Letzte Änderung: | 30 Aug 2024 09:21 |
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