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MA: Fachverband Magnetismus
MA 35: Spin dependent Transport Phenomena
MA 35.9: Talk
Wednesday, March 9, 2016, 17:15–17:30, H33
Material analysis of the spin and anomalous Hall efffect in dilute magnetic alloys — •Albert Hönemann1, Christian Herschbach1, Dmitry Fedorov2,1, Martin Gradhand3, and Ingrid Mertig1,2 — 1Martin Luther University Halle-Wittenberg, Halle, Germany — 2Max Planck Institute of Microstructure Physics, Halle, Germany — 3University of Bristol, Bristol, United Kingdom
The spin Hall effect (SHE) [1] and anomalous Hall effect (AHE) [2] are two allied transport phenomena caused by spin-orbit coupling. For dilute alloys, the dominant contribution to these effects is given by the skew-scattering mechanism. For relatively light hosts with heavy p scatterers, this mechanism causes the so-called giant SHE, as was obtained for Bi impurities in copper [3-5].
Here, we explore the strength of the skew-scattering mechanism in various dilute alloys based on Fe, Co, and Ni crystals by means of ab initio calculations performed within a semiclassical approach of Refs. [6,7]. Considering the SHE and the AHE in the investigated systems, an extensive study is presented uncovering trends and underlying microscopic processes.
[1] Sinova et al., Rev. Mod. Phys. 87, 1213 (2015); [2] Nagaosa et al., Rev. Mod. Phys. 82, 1539 (2010); [3] Gradhand et al., Phys. Rev. B 81, 245109 (2010); [4] Niimi et al., Phys. Rev. Lett. 109, 156602 (2012); [5] Fedorov et al., Phys. Rev. B 88, 085116 (2013); [6] Gradhand et al., Phys. Rev. Lett. 104, 186403 (2010); [7] Zimmermann et al., Phys. Rev. B 90, 220403(R) (2014).