ISIS Neutron and Muon Source Data Journal

Probing the local magnetic structure and magnetic ground states in strongly spin-orbit coupled Iridates

Abstract: Strong spin-orbit coupling often leads to exotic properties in otherwise a well understood pool of 'paramagnetic' heavy ion oxides. For a 5d4 system a J=0 total angular momentum ground state should be realised in a jj coupling scheme, which has not been observed till today. This is due to a subtle balance between electronic repulsion, crystal field (CF) and SOC, which makes the J=0 state a fragile one and also because in some cases singlet-triplet excitations of pseudospins may be at play. These excitations give rise to tiny magnetic moments which owing to exchange interactions on geometrically frustrated lattices may give rise to spin-orbital liquid state. We propose to probe with muSR such frustrated 5d4 iridate compounds having variations in the crystal field, based on the local Iridium coordination and overall crystal lattice.

Principal Investigator: Professor Fabrice Bert
Experimenter: Professor Philippe Mendels
Experimenter: Dr Sugata Ray
Experimenter: Mr Abhishek Nag
Local Contact: Dr Adrian Hillier
Experimenter: Dr Edwin Kermarrec
Experimenter: Mr Rafikul Ali Saha

DOI: 10.5286/ISIS.E.RB1620210

ISIS Experiment Number: RB1620210

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 Fabrice Bert et al; (2016): Probing the local magnetic structure and magnetic ground states in strongly spin-orbit coupled Iridates, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620210

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