Static and dynamic topological defects in the domain textures in the helical antiferromagnet Ni2⁢CoTeO6

Khan, Nazir; Barbour, Andi; Yang, Junjie; Cheong, Sang-Wook; Mazzoli, Claudio; Kiryukhin, Valery

doi:10.1103/physrevb.111.014435

Title: Static and dynamic topological defects in the domain textures in the helical antiferromagnet Ni₂⁢CoTeO₆

Journal Article · 24 January 2025 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.111.014435 · OSTI ID:2510448

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Rutgers Univ., Piscataway, NJ (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
New Jersey Institute of Technology (NJIT), Newark, NJ (United States)

Real-space Bragg coherent x-ray-diffractive imaging unveils the formation of bubble and stripe antiferromagnetic (AFM) phase domains on the surface of Ni₂⁢CoTeO₆ single crystal. The stripe domains exhibit dislocation-type topological defects. The defects typically form as defect-antidefect pairs and can be created or annihilated by temperature changes and local heating. Thermal fluctuations of the AFM domain walls are observed near the Néel temperature. Topological defect pairs dynamically form and disappear in the fluctuating state. These observations provide a real-space perspective on the dynamics of the AFM phase transition in a helical antiferromagnet. Finally, the remarkable tunability of AFM domain walls in a helical antiferromagnet underscores their potential for AFM spintronics applications.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Rutgers, The State University of New Jersey, Piscataway, NJ (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: FG02-07ER46382; SC0012704; SC0021188

OSTI ID:: 2510448

Report Number(s):: BNL--227552-2025-JAAM

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 1 Vol. 111; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
antiferromagnets
domain walls
magnetic phase transitions
magnetic texture
topological defects
x-ray diffraction
x-ray imaging

Title: Static and dynamic topological defects in the domain textures in the helical antiferromagnet Ni2⁢CoTeO6

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References (25)

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Title: Static and dynamic topological defects in the domain textures in the helical antiferromagnet Ni₂⁢CoTeO₆