TY - JOUR

T1 - Radially dependent stray field signature of chiral magnetic skyrmions

AU - Barton, Craig

AU - Fernández scarioni, Alexander

AU - Sakar, Baha

AU - Sievers, Sibylle

AU - Garcia-Sanchez, Felipe

AU - Thompson, Phillip

AU - Ajejas, Fernando

AU - Legrand, William

AU - Reyren, Nicolas

AU - Thomson, Thomas

AU - Cros, Vincent

AU - Schumacher, Hans W.

AU - Kazakova, Olga

N1 - Funding Information: This project, Project No. 17FUN08 TOPS, has received funding from the EMPIR program cofinanced by the Participating States and from the European Union's Horizon 2020 research and innovation program. The project also received financial support from the UK government department for Business, Energy and Industrial Strategy through NMS funding (Low Loss Electronics) and the UK national Quantum Technologies program. The work was cofunded by the Deutsche Forschungsgemeinschaft under Germany's Excellence Strategy—EXC-2123, QuantumFrontiers—390837967, and the DFG Priority Program No. SPP 2137 Skyrmionics. Financial support from the Agence Nationale de la Recherche, France, under Grant Agreements No. ANR-17-CE24-0025 (TOPSKY) and No. ANR-20-CE42-0012 (MEDYNA), and FET-Proactive Grant Agreement No. 824123 (SKYTOP) is acknowledged. C.B. is indebted to Dr. Volker Neu for use of the stripe domain magnetic reference sample . C.B. is further grateful to Dr. Agustina Asenjo for her donation of the GPNT nanorod MFM probes used in this study.

PY - 2023/9/12

Y1 - 2023/9/12

N2 - Magnetic skyrmions are topological spin structures that arise in chiral magnetic systems which exhibit broken inversion symmetry and high spin-orbit coupling resulting in a sizable Dzyaloshinskii-Moriya interaction. Understanding the local spin texture of skyrmions is a vital metrological step in the development of skyrmionic technologies required for novel logic or storage devices in addition to providing fundamental insight into the nanoscale chiral interactions inherent to these systems. Here, we propose that there exists a radially dependent stray field signature that emanates from magnetic skyrmions. We employ quantitative magnetic force microscopy to experimentally explore this stray field signature. To corroborate the experimental observations a semianalytical model is developed which is validated against micromagnetic simulations. This unique approach provides a route to understand the unique radially dependent field signature from skyrmions, which allows an understanding of the underlying local magnetization profile to be obtained. From a practical standpoint, our results provide a rapid approach to validate outputs from numerical or micromagnetic simulations. This approach could be employed to optimize the complex matrix of magnetic parameters required for fabricating and modeling skyrmionic systems, in turn accelerating the technology readiness level of skyrmionic based devices.

AB - Magnetic skyrmions are topological spin structures that arise in chiral magnetic systems which exhibit broken inversion symmetry and high spin-orbit coupling resulting in a sizable Dzyaloshinskii-Moriya interaction. Understanding the local spin texture of skyrmions is a vital metrological step in the development of skyrmionic technologies required for novel logic or storage devices in addition to providing fundamental insight into the nanoscale chiral interactions inherent to these systems. Here, we propose that there exists a radially dependent stray field signature that emanates from magnetic skyrmions. We employ quantitative magnetic force microscopy to experimentally explore this stray field signature. To corroborate the experimental observations a semianalytical model is developed which is validated against micromagnetic simulations. This unique approach provides a route to understand the unique radially dependent field signature from skyrmions, which allows an understanding of the underlying local magnetization profile to be obtained. From a practical standpoint, our results provide a rapid approach to validate outputs from numerical or micromagnetic simulations. This approach could be employed to optimize the complex matrix of magnetic parameters required for fabricating and modeling skyrmionic systems, in turn accelerating the technology readiness level of skyrmionic based devices.

UR - http://www.scopus.com/inward/record.url?scp=85172696644&partnerID=8YFLogxK

U2 - 10.1103/physrevb.108.104409

DO - 10.1103/physrevb.108.104409

M3 - Article

VL - 108

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 10

M1 - 104409

ER -