ISIS Neutron and Muon Source Data Journal

Spin dynamics and magnetism in CeRh6(Ge1-xSix)4

Abstract: In Ce-based heavy fermion materials, there is competition between the interactions which lead to a magnetically ordered arrangement of the Ce magnetic moments, and the hybridization between the local moments and conduction electrons, which quenches the local moments and gives rise to a non-magnetic ground state. Sometimes the magnetic transition can be tuned to zero temperature at a quantum critical point (QCP), where unusual properties arise due to quantum fluctuations. CeRh6Ge4 orders magnetically at a low temperature of 2.5 K, but by swapping Si for Ge, the magnetism is suppressed and eventually disappears, likely at a QCP. We propose to examine a series of these doped compounds using muon-spin relaxation so as to characterize the magnetically ordered state, examine how the magnetic state changes as it is suppressed, and to probe the spin fluctuations near the possible QCP.

Principal Investigator: Professor Michael Smidman
Local Contact: Dr Adrian Hillier
Experimenter: Dr Devashi Adroja
Experimenter: Professor Huiqiu Yuan

DOI: 10.5286/ISIS.E.RB1820463

ISIS Experiment Number: RB1820463

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 Michael Smidman et al; (2018): Spin dynamics and magnetism in CeRh6(Ge1-xSix)4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820463

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