Local thermoelectric response from a single Neél domain wall

Local thermoelectric response from a single Neél domain wall

WoS Article

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.

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.

Domain size; Length scale; Magnetic system; Micromagnetic models; Neel domain wall; Scanning probes; Spatially resolved; Thermal; Thermoelectric; Thermoelectric response

Domain size; Length scale; Magnetic system; Micromagnetic models; Neel domain wall; Scanning probes; Spatially resolved; Thermal; Thermoelectric; Thermoelectric response

Puttock, R.; Barton, C.; Saugar, E.; Klapetek, P.; Fernández-Scarioni, A.; Freitas, P.; Schumacher, H.; Ostler, T.; Chubykalo-Fesenko, O.; Kazakova, O.

2023

25.11.2022

2375-2548

Science Advances

8

47

United States of America

eadc9798

9

https://www.science.org/doi/10.1126/sciadv.adc9798