ISIS Neutron and Muon Source Data Journal

Magnetic correlations and possible quantum ground state in a pyrochlore osmate

Abstract: Magnetic order is a property of crystalline materials which contain systems of coupled magnetic moments. In materials known as geometrically frustrated magnets there exist coupled magnetic moments but they do not order because there is no one ordering pattern which is more favourable than others. Materials having the cubic pyrochlore structure often behave like this. We have studied a cubic pyrochlore containing osmium and found evidence for magnetic correlations but no magnetic order down to 1.6 K. Osmium in this material is special because the moment tends to fluctuate due to quantum mechanical entanglement of spin and orbital angular momentum. We will use muon spin relaxation to determine whether our osmium pyrochlre orders magnetically below 1.6 K, and to try to understand whether magnetic frustration and quantum fluctuations are responsible for the suppression of magnetic order.

Principal Investigator: Professor Andrew Boothroyd
Local Contact: Dr Peter Baker
Experimenter: Professor Marein Rahn
Experimenter: Mr Nathaniel Davies
Experimenter: Professor Stephen Blundell

DOI: 10.5286/ISIS.E.RB1610164

ISIS Experiment Number: RB1610164

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:
Professor Andrew Boothroyd et al; (2016): Magnetic correlations and possible quantum ground state in a pyrochlore osmate, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610164

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