Publikationsdatum:
2018-06-07
Beschreibung:
Author(s): Charles S. Spencer, Jacob Gayles, Nicholas A. Porter, Satoshi Sugimoto, Zabeada Aslam, Christian J. Kinane, Timothy R. Charlton, Frank Freimuth, Stanislav Chadov, Sean Langridge, Jairo Sinova, Claudia Felser, Stefan Blügel, Yuriy Mokrousov, and Christopher H. Marrows Magnetic materials with chiral lattices are known to support chiral spin textures such as skyrmions and chiral bobbers. These give rise to transport properties, intrinsically linked to their nontrivial topology. Here, the authors study epitaxial films of Fe 1 − y Co y Ge across the entire range from the well-known chiral magnet FeGe to the nonmagnetic CoGe. The measured magnetic and transport properties are compared with the results of a b i n i t i o electronic structure calculations. Theory and experiment agree on a change in sign of the chiral Dzyaloshinskii-Moriya interaction at y ∼ 0 . 45 . Nevertheless, the observed topological Hall effect for neighboring values of y is far larger than theory predicts. This discrepancy points to the need for a deeper understanding of transport in disordered half-metallic chiral magnets. [Phys. Rev. B 97, 214406] Published Wed Jun 06, 2018
Schlagwort(e):
Magnetism
Print ISSN:
1098-0121
Digitale ISSN:
1095-3795
Thema:
Physik
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