ISIS Neutron and Muon Source Data Journal

Covalency induced energy scale entanglement in Pr4+ compounds

Abstract: Lanthanides, which typically exist in a trivalent oxidation state, possess filled 5s and 5p orbitals which shield the 4f electrons from surrounding ligands. As a result, the 4f electrons are typically only weakly perturbed by the crystalline electric field (CEF) and the spin orbital manifolds are well-separate. However, the tetravalent lanthanides show qualitatively different behavior to their 3+ counterparts. The key ingredient is the hybridization of the central ion?s f orbital with the valence p orbitals of the ligands, which contrasts with the ionic bonding found in Ln3+ systems. This covalency affects both the single ion energy scales and the inter-ion interactions, leading to anomalous magnetic behavior. In this proposal we aim to investigate the low energy magnetic excitations in Pr4+ compounds where the poor separation of energy scales and anomalously small magnetic moment may give rise to novel quantum magnetic phenomena.

Principal Investigator: Professor Martin Mourigal
Local Contact: Dr Duc Le
Experimenter: Dr Harry Lane
Experimenter: Dr Arun Ramanathan
Experimenter: Professor Henry La Pierre

DOI: 10.5286/ISIS.E/ISIS.E.RB2410546

ISIS Experiment Number: RB2410546

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 Martin Mourigal et al; (2024): Covalency induced energy scale entanglement in Pr4+ compounds, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E/ISIS.E.RB2410546

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