Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 29: Spin dependent Transport Phenomena
MA 29.4: Vortrag
Dienstag, 21. März 2017, 14:45–15:00, HSZ 403
Nonlocal anomalous Hall effect in ternary alloys — •Franziska Töpler1, Albert Hönemann1, Katarina Tauber1, Dmitry Fedorov2,1, Martin Gradhand3, Ingrid Mertig1,2, and Albert Fert4 — 1Martin Luther University Halle-Wittenberg, Halle, Germany — 2Max Planck Institute of Microstructure Physics, Halle, Germany — 3University of Bristol, Bristol, United Kingdom — 4Université Paris-Sud, Université Paris-Saclay, Paris, France
The spin Hall effect (SHE) [1] and the anomalous Hall effect (AHE) [2] are two promising phenomena for novel spintronic devices. Authors of Ref. [3] proposed to enhance the AHE in noble metal hosts with magnetic 3d impurities by codoping of heavy nonmagnetic impurities.
We present a detailed study [4] of the transverse charge transport in such ternary alloys related to the so-called nonlocal AHE, recently introduced [5]. The results of our ab initio calculations are underpinned and explained by theoretical investigations via Matthiessen’s rule. Considering transport properties of the constituent binary alloys, we reveal optimal host-impurity combinations to enhance the AHE. This allows us to explain experimental findings [3] showing a strong effect in Cu-based alloys but a vanishing effect in the case of the Au host.
[1] Sinova et al., Rev. Mod. Phys. 87, 1213 (2015)
[2] Nagaosa et al., Rev. Mod. Phys. 82, 1539 (2010)
[3] Fert et al., J. Magn. Magn. Mater. 24, 231 (1981)
[4] Töpler et al., Phys. Rev. B 94, 140413(R) (2016)
[5] Zhang and Vignale, Phys. Rev. Lett. 116, 136601 (2016)