Local thermoelectric response from a single Neél domain wall

authored by
Robert Puttock, Craig Barton, Elias Saugar, Petr Klapetek, Alexander Fernández-Scarioni, Paulo Freitas, Hans W. Schumacher, Thomas Ostler, Oksana Chubykalo-Fesenko, Olga Kazakova
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 magnetization 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 modeling, we conclude that the measured thermoelectric signature is unique to that of a domain wall with a Neél-like character. Our approach is highly sensitive to the plane of domain wall rotation, which permits the distinct identification of Bloch or Neél walls at the nanoscale and could pave the way for the identification and characterization of a range of noncollinear spin textures through their thermoelectric signatures.

External Organisation(s)
National Physical Laboratory (NPL)
Spanish National Research Council (CSIC)
Czech Metrology Institute (CMI)
Brno University of Technology
National Metrology Institute of Germany (PTB)
INESC-ID
Sheffield Hallam University
University of Hull
Type
Article
Journal
Science advances
Volume
8
ISSN
2375-2548
Publication date
11.2022
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
General
Electronic version(s)
https://doi.org/10.1126/sciadv.adc9798 (Access: Open)