Chiral spin textures in amorphous iron germanium thick films

Robert Streubel

doi:10.1117/12.2592233

2 August 2021 Chiral spin textures in amorphous iron germanium thick films

Robert Streubel

Proceedings Volume 11805, Spintronics XIV; 118050Y (2021) https://doi.org/10.1117/12.2592233
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

To date, the emergence of topological vector fields has almost exclusively been associated with a global inversion symmetry breaking that causes a vector spin exchange, known as Dzyaloshinskii-Moriya interaction. Engineering a locally varying vector spin exchange has been proposed as an alternative to stabilize anisotropic topological states. I will present experimental evidence of 3D chiral spin textures stabilized in amorphous iron germanium thick films with local inversion symmetry breaking and DMI [1]. Lorentz microscopy with exit wave reconstruction revealed both isotropic Bloch skyrmions and anisotropic solitons, which are accompanied by a reduced orbital-to-spin moment ratio, underling the importance of disordered electron orbitals and random DMI. Persistent switching of anisotropic skyrmions corroborate variations in magnetic anisotropy and exchange, and confirm a degenerate spin chirality and particle-like properties.

Conference Presentation

Citation Download Citation

Robert Streubel "Chiral spin textures in amorphous iron germanium thick films", Proc. SPIE 11805, Spintronics XIV, 118050Y (2 August 2021); https://doi.org/10.1117/12.2592233

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