Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 38: Spin hall effects

MA 38.6: Vortrag

Mittwoch, 3. April 2019, 18:30–18:45, H52

Impurity induced Spin-Dependent Transport in Uranium Thin Films — •Ming-Hung Wu and Martin Gradhand — H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, United Kingdom

Uranium, a light actinide with itinerant 5f-electrons has been investigated for decades due to its complex properties [1]. It crystallizes in a large variety of structures such as α (orthorhombic), β (bct), γ (bcc) and hcp phase, it shows superconductivity and is close to a ferromagnetic transition [2]. Furthermore, its strong spin-orbital coupling makes uranium a promising material for spintronics applications. Especially in magnetic multilayer systems the proximity of heavy, large spin-orbit coupling, and ferromagnetic materials promises interesting emergent behavior [3]. In order to shed light on the complex physics in multilayer systems, we focus on the spin-dependent transport of uranium thin film. In our ab initio calculations we analyze the spin Hall effect and anomalous Hall effect in bulk uranium incorporating Fe impurities. We extend this work to free standing uranium thin film and discuss the implications of magnetic as well as non-magnetic impurities on the spin-dependent transport in multilayers including ferromagnetic materials.

Reference

[1] S. Adak et al., Phys. B 406, 3342 (2011).

[2] J.-C. Griveau et al., C. R. Phys. 15, 599 (2014).

[3] R. Springell et al., Phys. Rev. B 77, 064423 (2008).