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- W2024650152 abstract "Neutron diffraction techniques have been used to investigate the magnetic ordering of the Tb ions in polycrystalline Pb2Sr2TbCu3O8. Significant magnetic correlations are found to develop below ∼10 K, and these correlations are two dimensional in nature, representative of the strongly anisotropic magnetic interactions in these layered materials. The correlation length increases with decreasing temperature, and long-range order is observed to develop at TN≊5.5 K. However, the sawtooth Bragg profile for the scattering demonstrates that the long-range order is two dimensional, rather than three dimensional, with a spin configuration where nearest-neighbor spins are antiparallel. The scattering profile can be explained quantitatively by assuming long-range order within the ab plane, with no significant correlations along the c axis to the lowest temperatures measured (1.36 K). Our results suggest that the system is well described by a two-dimensional Ising model. The only other (pure) system where a crossover to three-dimensional behavior is not observed is DyBa2Cu4O8." @default.
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- W2024650152 date "1994-05-15" @default.
- W2024650152 modified "2023-09-24" @default.
- W2024650152 title "Two‐dimensional magnetic order in Pb<sub>2</sub>Sr<sub>2</sub>TbCu<sub>3</sub>O<sub>8</sub>" @default.
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- W2024650152 doi "https://doi.org/10.1063/1.356907" @default.
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