Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster 1

MA 19.63: Poster

Dienstag, 6. September 2022, 17:30–20:00, P2

Spin Hall magnetoresistance effect in orthoferrites/Pt heterostructures. — S. Becker¹, •E.F. Galindez-Ruales¹, A. Ross¹, E. Pomjakushina², F. Schreiber¹, R. Lebrun^1,3, G. Jakob¹, O. Gomonay¹, and M. Kläui¹ — ¹Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany. — ²Laboratory for Multiscale Materials Experiments, PSI, 5232, Villigen PSI, Switzerland — ³Unité Mixte de Physique CNRS-Thales, Palaiseau, France

Although there are advantages of antiferromagnetic systems [1], there are some limitations in the length of the spin transmission distance that only recently have been tackled using orthoferrites [2]. TmFeO₃ (TFO), a rare earth orthoferrite, possesses both collinear antiferromagnetic ordering and a net canted ferromagnetic moment. That is due to the bulk Dzyaloshinskii-Moriya interaction (DMI), which leads to a canting of the four magnetic iron sublattices [3]. Spin Hall magnetoresistance (SMR) is used to investigate the magnetic properties of a bulk sample [4] . We can identify the onset of the spin reorientation transition (SRT) as well as the spin-flop field, which changes approximately linearly with temperature around the SRT. We observe differences between the different devices likely stemming from the symmetry breaking at the TFO/Pt interface due to interfacial DMI.

[1] Lebrun, R., et al. Nat. Commun 11, 6332 (2020). [2] S. Das, et. al. ArXiv:2112.05947 [cond-mat.str-el] [3] S. Becker, et.al. Phys. Rev. B103, 024423 (2021). [4] R. Lebrun, et. al. Commun. Phys. 2, 50 (2019).