Dresden 2026 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Frustrated Magnets I (joint session MA/TT)

MA 19.7: Vortrag

Dienstag, 10. März 2026, 11:15–11:30, POT/0361

Atomically sharp magnetic solitons for racetrack memory at the spatial limit — K Allen¹, K Du², J Bouaziz³, S Mishra¹, G Bihlmayer³, Y Zhang¹, Y Hao⁴, V Ukleev⁵, C Luo⁵, F Radu⁵, Y Gao¹, Ch Lane⁶, J-X Zhu⁶, M Yi¹, H Cao⁴, S-W Cheong², •Stefan Blügel³, and Emilia Morosan¹ — ¹Dept. of Physics and Astronomy & Rice Center for Quantum Materials, Rice University, Houston, 77005, TX, USA — ²Dept. of Physics and Astronomy, Rutgers University, Piscataway, 08854, NJ, USA — ³Peter-Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany — ⁴Neutron Scattering Division, Oak Ridge Natl Lab, Oak Ridge, 37831, TN, USA — ⁵Helmholtz-Zentrum Berlin, 14109 Berlin, Germany — ⁶Theoretical Division, Los Alamos Nat. Lab., Los Alamos, 87545, NM, USA

We discuss the physics of a metallic square-net lattice rare-earth compound that exhibits RKKY interactions leading to magnetic frustration whose effective exchange interactions competes with the uniaxial anisotropy resulting in a rare ferrimagnetic up-up-down phase. Applying magnetic fields, atomically sharp solitons can be precipitated that have all the foundational credentials for a racetrack memory at the spatial limit. We present DFT calculations relating the RKKY interaction and the magnetic anisotropy to the electronic structure. We performed atomistic spin-dynamics calculations relating the interaction parameters to the soliton formation. A combination of experiments will be presented that provide evidence of the 1D magnetic solitons.

Keywords: Rare-Earth Compounds, Solitons, Cryo-Spintronics