Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Focus Session: Spinorbitronics – from efficient charge/spin conversion based on spin-orbit coupling to chiral magnetic skyrmions I (joint session MA/TT)

MA 40.3: Vortrag

Donnerstag, 15. März 2018, 10:15–10:30, H 1012

Control of the skyrmion Hall angle by combining spin-Hall effect, breathing mode and in-plane field — •Riccardo Tomasello¹, Anna Giordano², Roberto Zivieri², Vito Puliafito³, Stefano Chiappini⁴, Bruno Azzerboni³, Mario Carpentieri⁵, and Giovanni Finocchio² — ¹Dept. Engineering, Polo Scientifico e Didattico di Terni, University of Perugia, Terni, Italy — ²Dept. Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, Messina, Italy — ³Dept. Engineering, University of Messina, Messina, Italy — ⁴Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy — ⁵Dept. Electrical and Information Engineering, Politecnico di Bari, Bari, Italy

The spin-Hall effect(SHE)-driven skyrmion motion is characterized by an in-plane angle, i.e. the skyrmion Hall angle (SHA)[1].

Here, we micromagnetically report, for the first time, the SHE-driven dynamics of a breathing skyrmion. In particular, we can excite the breathing mode by applying an ac perpendicular-polarized current[2] and we can control the SHA by an in-plane external field Hy. Our results show that the SHA depends on the SHE current only under the simultaneous presence of Hy and breathing mode. Our achievements can be important for understanding the origin of the SHA current dependence when the field-like torque comes from the SHE and the breathing mode is due to temperature and/or disordered parameters[3].

[1]G. Chen, Nat. Phys. 13, 112 (2017). [2]G. Finocchio et al., Appl. Phys. Lett. 107, 262401 (2015). [3]J.-V. Kim and M.-W. Yoo, Appl. Phys. Lett. 110, 132404 (2017).