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Persistent URL http://purl.org/net/epubs/work/54002674
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Record Id 54002674
Title Partitioning the Two-Leg Spin Ladder in Ba2Cu1 – xZnxTeO6: From Magnetic Order through Spin-Freezing to Paramagnetism
Abstract Ba2CuTeO6 has attracted significant attention as it contains a two-leg spin ladder of Cu2+ cations that lies in close proximity to a quantum critical point. Recently, Ba2CuTeO6 has been shown to accommodate chemical substitutions, which can significantly tune its magnetic behavior. Here, we investigate the effects of substitution for non-magnetic Zn2+ impurities at the Cu2+ site, partitioning the spin ladders. Results from bulk thermodynamic and local muon magnetic characterization on the Ba2Cu1 – xZnxTeO6 solid solution (0 ≤ x ≤ 0.6) indicate that Zn2+ partitions the Cu2+ spin ladders into clusters and can be considered using the percolation theory. As the average cluster size decreases with increasing Zn2+ substitution, there is an evolving transition from long-range order to spin-freezing as the critical cluster size is reached between x = 0.1 to x = 0.2, beyond which the behavior became paramagnetic. This demonstrates well-controlled tuning of the magnetic disorder, which is highly topical across a range of low-dimensional Cu2+-based materials. However, in many of these cases, the chemical disorder is also relatively strong in contrast to Ba2CuTeO6 and its derivatives. Therefore, Ba2Cu1 – xZnxTeO6 provides an ideal model system for isolating the effect of defects and segmentation in low-dimensional quantum magnets.
Funding Information EPSRC (EP/T011130/1); Leverhulme Trust (ECF-2021-170); Leverhulme Trust (RPG-2017-109); Max-Planck-Gesellschaft; Alexander von Humboldt-Stiftung
Related Research Object(s): 10.5286/ISIS.E.RB1990046
Licence Information: Creative Commons Attribution 4.0 International (CC BY 4.0)
Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article Chem Mater 35, no. 7 (2023): 2752-2761. doi:10.1021/acs.chemmater.2c02939 2023