ISIS Neutron and Muon Source Data Journal

INELASTIC NEUTRON SCATTERING STUDY OF THE CRYSTALLINE ELECTRIC FIELD OF CeNi9GeGa3 AND CeNi9Ga4

Abstract: A current hot topic in correlated electron physics is the magnetic phase diagram resulting from competing Kondo and RKKY interactions with magnetic frustration. One interesting system in this context may be CeNi9Ga4 and solid solutions CeNi9Ge4-xGax which crystallize in a tetragonal structure. CeNi9Ge4 was found to be near a heavy fermion quantum critical point, showing a paramagnetic ground state with a huge Sommerfeld coefficient, exceeding 5.5 J/molK² . The latter appears being stabilized by its quasi-quartet crystal field (CEF) ground state degeneracy. In the solid solution series CeNi9Ge4-xGax we observe a pronounced weakening of the Kondo interaction and the appearance of long range magnetic order with a maximum TN ~2.8 K for CeNi9Ge3Ga. We proposed here to investigate crystal field excitations in this system in order to understand the complex magnetic ground state.

Principal Investigator: Dr Herwig Michor
Local Contact: Dr Devashi Adroja
Experimenter: Dr Ernst-Wilhelm Scheidt

DOI: 10.5286/ISIS.E.RB1810773

ISIS Experiment Number: RB1810773

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 Herwig Michor et al; (2019): INELASTIC NEUTRON SCATTERING STUDY OF THE CRYSTALLINE ELECTRIC FIELD OF CeNi9GeGa3 AND CeNi9Ga4 , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810773

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