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Anisotropy of antiferromagnetic domains in a spin-orbit Mott insulator

Year: 2023
Type: article
Abstract: The temperature-dependent behavior of magnetic domains plays an essential role in the magnetic properties of materials, leading to widespread applications. However, experimental methods to access the three-dimensional (3D) magnetic domain structures are very limited, especially for antiferromagnets. Over the past decades, the spin-orbit Mott insulator iridate ${\mathrm{Sr}}_{2}\mathrm{Ir}{\mathrm{O}}_{4}$ has attracted particular attention because of its interesting magnetic structure and analogy to superconducting cuprates. Here, we apply resonant x-ray magnetic Bragg coherent diffraction imaging to track the real-space 3D evolution of antiferromagnetic ordering inside a ${\mathrm{Sr}}_{2}\mathrm{Ir}{\mathrm{O}}_{4}$ single crystal as a function of temperature, finding that the antiferromagnetic domain shows anisotropic changes. The anisotropy of the domain shape reveals the underlying anisotropy of the antiferromagnetic coupling strength within ${\mathrm{Sr}}_{2}\mathrm{Ir}{\mathrm{O}}_{4}$. These results demonstrate the high potential significance of 3D domain imaging in magnetism research.
DOI: 10.1103/physrevb.108.l020403
Authors: Longlong Wu, Wei Wang, Tadesse A. Assefa, Ana F. Suzana, Jiecheng Diao, Hengdi Zhao, Gang Cao, Ross J. Harder, Wonsuk Cha, Kim Kisslinger, Mark P. M. Dean, Ian K. Robinson
Institutions: Brookhaven National Laboratory, SLAC National Accelerator Laboratory, London Centre for Nanotechnology, University College London, University of Colorado Boulder, Argonne National Laboratory, Advanced Photon Source, Center for Functional Nanomaterials
Language: English
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Office of Science, Engineering and Physical Sciences Research Council, Division of Materials Research, Basic Energy Sciences, Brookhaven National Laboratory, Division of Materials Sciences and Engineering
Awards: G102163711, G1210759672, G1229526393, G1285306620, G1286251239, G1847291448, G1868695577, G2287611682, G2371548206, G241279073, G262962599, G303061748, G3262563802, G357145406, G3589692066, G3702897590, Discovery and control of high-Z materials - Beyond Mott and topological materials, G3850097093, G426311843, G4662383146, G495301720, G4972998915, Development of a Coherent X-Ray Diffraction Instrument, G498139845, G513797252, G5387317844, G5417557083, G5535608740, G5570207115, G5633341255, G5765906131, G5904151224, G6550344761, G6733788163, G6848031779, G6918803902, G6965541988, Discovery and study of spin-orbit-coupled quantum materials, G7283024673, G7463374569, G7583137537, G8382000481, G872144517, G911061179, G969889393, G993149817
OpenAlex ID: W4384928056
FWCI: 0.181
Cites: 41
Cited by: 2
Related to: 10