ISIS Neutron and Muon Source Data Journal

Magnetic ground state of the breathing pyrochlore Ba3Yb2Zn5O11

Abstract: "Breathing pyrochlores" are a new class of material that contain sublattices of corner sharing tetrahedra, where the the sizes of the tetrahedra differ on the different sublattices. The recently synthesised Ba3Yb2Zn5O11 has been reported to be such a geometrically frustrated pyrochlore, in which the Yb ions adopt a pseudo-spin-1/2 ground state. The measured negative Curie-Weiss temperature indicates significant antiferromagnetic exchange couplings. However, no long range order has been observed to sub-Kelvin temperatures, and a proposed theoretical model predicts the emergence of a quantum spin ice state in breathing pyrochlores. We propose to investigate and characterise the magnetic ground state of this material using positive muons as local magnetic probes, utilising their sensitivity to long range order formation and the dynamics of the magnetic moments.

Principal Investigator: Dr Franz Lang
Experimenter: Dr John Wilkinson
Experimenter: Dr Roger Johnson
Experimenter: Professor Sara Haravifard
Experimenter: Dr Sachith Dissanayake
Local Contact: Dr Peter Baker
Experimenter: Professor Stephen Blundell
Experimenter: Mr William Steinhardt

DOI: 10.5286/ISIS.E.RB1820209

ISIS Experiment Number: RB1820209

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 Franz Lang et al; (2019): Magnetic ground state of the breathing pyrochlore Ba3Yb2Zn5O11, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820209

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