Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 62: Disodered Magnetic Materials

MA 62.3: Vortrag

Freitag, 20. März 2020, 10:00–10:15, HSZ 401

Large Hall angle of the disordered B2 Fe₆₀Al₄₀ alloy — •Václav Drchal¹, Josef Kudrnovský¹, František Máca¹, Ilja Turek², and Sergii Khmelevskyi³ — ¹Inst. of Physics, Czech Acad. Sci., Praha, Czech Republic — ²Inst. of Physics of Materials, Czech Acad. Sci., Brno, Czech Republic — ³Center for Computational Materials Science, Vienna University of Technology, Austria

The electronic and transport properties of the ordered B2 Fe₆₀Al₄₀ alloy which undergoes a continuous transition into disordered A2 Fe₆₀Al₄₀ phase are studied from first principles. Variation of the alloy disorder due to Fe antisites on Al sublattice is characterized by the partial long-range order. This is the simplest model of gradual disordering of the ordered phase due to the ion irradiation. The physical properties are strongly influenced by varying local environment of Fe atoms on both sublattices. This leads to the transition between a very low moment in the ordered phase to a high moment at large disorder. Similar behavior is found also for anomalous Hall conductivity and anomalous Hall angle. The disordered phase has a large Hall angle as contrasted with a negligible Hall angle for well ordered samples, which is in agreement with recent experiment.