Details

Autor(en) / Beteiligte

• Zeissler, Katharina
• Finizio, Simone
• Shahbazi, Kowsar
• Massey, Jamie
• Ma’Mari, Fatma Al
• Bracher, David M.
• Kleibert, Armin
• Rosamond, Mark C.
• Linfield, Edmund H.
• Moore, Thomas A.
• Raabe, Jörg
• Burnell, Gavin
• Marrows, Christopher H.

Titel

Discrete Hall resistivity contribution from Néel skyrmions in multilayer nanodiscs

Ist Teil von

• Nature nanotechnology, 2018-12, Vol.13 (12), p.1161-1166

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Magnetic skyrmions are knot-like quasiparticles. They are candidates for non-volatile data storage in which information is moved between fixed read and write terminals. The read-out operation of skyrmion-based spintronic devices will rely on the electrical detection of a single magnetic skyrmion within a nanostructure. Here we present Pt/Co/Ir nanodiscs that support skyrmions at room temperature. We measured the Hall resistivity and simultaneously imaged the spin texture using magnetic scanning transmission X-ray microscopy. The Hall resistivity is correlated to both the presence and size of the skyrmion. The size-dependent part matches the expected anomalous Hall signal when averaging the magnetization over the entire disc. We observed a resistivity contribution that only depends on the number and sign of skyrmion-like objects present in the disc. Each skyrmion gives rise to 22 ± 2 nΩ cm irrespective of its size. This contribution needs to be considered in all-electrical detection schemes applied to skyrmion-based devices. Not only the area of Néel skyrmions but also their number and sign contribute to their Hall resistivity. Not only the area of Néel skyrmions, but also their number and sign contribute to their Hall resistivity.