Incommensurate magnetic order in the Formula Presented kagome metal Formula Presented

被引:3
|
作者
Porter Z. [1 ,2 ]
Pokharel G. [1 ]
Kim J.-W. [3 ]
Ryan P.J. [3 ]
Wilson S.D. [1 ,4 ]
机构
[1] Materials Department, University of California, Santa Barbara, 93106, CA
[2] Linac Coherent Light Source and Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, 94025, CA
[3] X-ray Science Division, Argonne National Laboratory, Argonne, 60439, IL
[4] California Nanosystems Institute, University of California, Santa Barbara, 93106, CA
基金
美国国家科学基金会;
关键词
Ferromagnetism - Manganese compounds;
D O I
10.1103/PhysRevB.108.035134
中图分类号
学科分类号
摘要
We characterize the magnetic ground state of the topological kagome metal Formula Presented via resonant x-ray diffraction. Previous magnetoentropic studies of Formula Presented suggested the presence of a modulated magnetic order distinct from the ferromagnetism that is easily polarized by the application of a magnetic field. Diffraction data near the Gd-Formula Presented edge directly resolve a Formula Presented-axis modulated spin structure order on the Gd sublattice with an incommensurate wave vector that evolves upon cooling toward a partial lock-in transition. While equal moment (spiral) and amplitude (sine) modulated spin states cannot be unambiguously discerned from the scattering data, the overall phenomenology suggests an amplitude modulated state with moments predominantly oriented in the Formula Presented plane. Comparisons to the “double-flat” spiral state observed in Mn-based Formula Presented kagome compounds of the same structure type are discussed. © 2023 American Physical Society
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