ISIS Neutron and Muon Source Data Journal

HIGH FIELD MUSR STUDY OF SHORT AND LONG RANGE MAGNETIC CORRELATIONS IN CeNi9GeGa3 AND CeNi9Ga4

Abstract: The interesting magnetic phase diagram results 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 tetragonalstructure. 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 CeNi9Ge4-xGax we observed a long range magnetic order with a maximum TN ~2.8 K for CeNi9Ge3Ga, while CeNi9Ga4 shows a weak magnetic transition near 0.5K, which change from FM-type to AFM-type in an applied field >=0.5T. We therefore proposed here to investigate these compounds using musr measurements on HiFi to understand the complex nature of the magnetic ordering.

Principal Investigator: Dr Herwig Michor
Local Contact: Dr Mark Telling
Experimenter: Dr James Lord
Experimenter: Dr Devashi Adroja
Experimenter: Dr Ernst-Wilhelm Scheidt

DOI: 10.5286/ISIS.E.RB1810786

ISIS Experiment Number: RB1810786

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; (2018): HIGH FIELD MUSR STUDY OF SHORT AND LONG RANGE MAGNETIC CORRELATIONS IN CeNi9GeGa3 AND CeNi9Ga4 , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810786

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