ISIS Neutron and Muon Source Data Journal

Possible quantum spin liquid state in disorder-induced spin-1/2 frustrated 3D pseudocubic Ba3CuTa2O9

Abstract: A polycrystalline sample (about 2 gram) of the title compound Ba3CuTa2O9 was prepared by the conventional solid-state reaction method. Rietveld refinement of the XRD data at T = 300 K confirms that the material is in a single phase with P4/mmm (No. 123) space group. Curie-Weiss fitting of magnetic susceptibility data indicates strong antiferromagnetic coupling (AFM CW temperature - 24 K) among the Cu2+ (S = 1/2) moments arranged in a 3D pseudocubic framework. Our susceptibility (down to 1.8 K) and specific heat (down to 690 mK) depict no evidence of long-range magnetic ordering. These measurements indicate that Ba3CuTa2O9 might host a quantum spin-liquid (QSL) state. Further, the data collapsing behavior of field-dependent magnetization at several temperatures and temperature-dependent susceptibility at several fields with appropriate scaling exponents suggests the possible existence of a random spin-singlet (RSS) state on top of a QSL state. Thus, it is essential to perform the muSR experiments to explore the putative QSL behavior in the well-characterized polycrystalline sample of Ba3CuTa2O9.

Principal Investigator: Dr Tusharkanti Dey
Experimenter: Dr Saikat Nandi
Experimenter: Mr Romario Mondal
Experimenter: Professor Avinash Mahajan
Local Contact: Dr Peter Baker

DOI: 10.5286/ISIS.E.RB2510439

ISIS Experiment Number: RB2510439

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Tusharkanti Dey et al; (2025): Possible quantum spin liquid state in disorder-induced spin-1/2 frustrated 3D pseudocubic Ba3CuTa2O9, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2510439

Data is released under the CC-BY-4.0 license.