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Devil's staircase magnetic spirals in
Phys. Rev. B 114, 034403 – Published 6 July, 2026
DOI: https://doi.org/10.1103/dlvy-9bd9
Abstract
solid solutions (, 0.2, 0.3, 0.4) have been studied by magnetization and neutron powder diffraction measurements. All samples are magnetically ordered below and metamagnetic transitions are observed at fields T at 2 K. Neutron diffraction shows that the metamagnetic transition marks a -flop from helical wave vector to cycloidal spin spirals, and the latter gradually transform to a coexisting ferrimagnetic state at higher field. Fractional values of and are consistent with complete devil's staircase behavior, driven by locking-in of spins to easy-axis directions in the -plane that stabilizes commensurate wave vectors ().
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