Local Thermoelectric Response from a Single Néel Domain Wall

Puttock, Robert; Barton, Craig; Saugar, Elias; Klapetek, Petr; Fernández-Scarioni, Alexander; Freitas, Paulo; Schumacher, Hans W; Ostler, Thomas; Kazakova, Olga

Abstract

Spatially resolved thermoelectric detection of magnetic systems provides a unique platform for the investigation of spintronic and spin caloritronic effects. Hitherto, these investigations have been resolution limited, confining analysis of the thermoelectric response to regions where the magnetisation is uniform or collinear at length scales comparable to the domain size. Here, we investigate the thermoelectric response from a single trapped domain wall using a heated scanning probe. Following this approach, we unambiguously resolve the domain wall due to its local thermoelectric response. Combining analytical and thermal micromagnetic modelling, we conclude that the measured thermoelectric signature is unique to that of a domain wall with Néel like character. Our approach is highly sensitive to the plane of domain wall rotation, which permits the distinct identification of Bloch or Néel walls at the nanoscale and could pave the way for the identification and characterisation of a range of non-collinear spin textures through their thermoelectric signatures.

Citation

Puttock, R., Barton, C., Saugar, E., Klapetek, P., Fernández-Scarioni, A., Freitas, P., …Kazakova, O. (2022). Local Thermoelectric Response from a Single Néel Domain Wall. Science Advances, 8(47), https://doi.org/10.1126/sciadv.adc9798

• Journal Article Type: Article
• Acceptance Date: Oct 24, 2022
• Online Publication Date: Nov 23, 2022
• Publication Date: Nov 25, 2022
• Deposit Date: Oct 21, 2022
• Publicly Available Date: Nov 25, 2022
• Journal: Science Advances
• Publisher: American Association for the Advancement of Science
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: 47
• DOI: https://doi.org/10.1126/sciadv.adc9798
• Public URL: https://hull-repository.worktribe.com/output/4100823