Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 51: Spin Transport and Orbitronics, Spin-Hall Effects II (joint session MA/TT)
MA 51.2: Vortrag
Donnerstag, 12. März 2026, 15:15–15:30, POT/0361
Single and double spin Hall anomalous Hall and Hanle effects in Pt/YIG and Ta/YIG bilayers — •Akashdeep Akashdeep, Duc Minh Tran, Mathias Kläui, Gerhard Jakob, and Timo Kuschel — Johannes Gutenberg University Mainz, Germany
Anomalous Hall effect data of heavy metal / magnetic insulator bilayers, such as Pt/Y3Fe5O12 (YIG), are commonly explained by magnetoresistance effects that are quadratically depending on the spin Hall angle (SHA) [1-4]. This is because they usually consist of two spin Hall processes as for example valid for spin Hall magnetoresistance [1,2]. In addition, S. Zhang et al. predicted theoretically a single spin Hall process combined with interfacial spin-dependent scattering which results in a linear SHA dependence [5] not reported experimentally so far.
In this contribution, we present anomalous Hall effect results for Pt/YIG and Ta/YIG with opposite sign in SHA of Pt and Ta. Thus, we can probe even and odd SHA dependencies. For thin Pt and Ta thicknesses, we observe results that are even in the SHA which is consistent with experimental literature. However, we found an odd SHA dependence for thicker heavy metal layers which is only partially mentioned in theory. We will present the separation of the effects and discuss the impact of the SHA on the individual effect contributions.
[1] H. Nakayama et al., Phys. Rev. Lett. 110, 206601 (2013)
[2] S. Meyer et al., Appl. Phys. Lett. 106, 132402 (2015)
[3] S. Vélez et al., Phys. Rev. Lett. 116, 016603 (2016)
[4] J. Li et al., Phys. Rev. B 106, 184420 (2022)
[5] S. S.-L. Zhang, G. Vignale, Phys. Rev. Lett. 116, 136601 (2016)
Keywords: anomalous Hall effect; Hanle effect; spin Hall magnetoresistance; spin Hall angle