ISIS Neutron and Muon Source Data Journal

Observation of the crystal-electric-field excitations in the frustrated triangular metal RNiAl4Ge2 (R = Tb, Dy, Ho, Er).

Abstract: Geometrical frustration suppresses conventional order and yields large ground-state degeneracy, enabling exotic magnetism. Metallic frustrated systems remain relatively unexplored: here long-range, oscillatory RKKY exchange combined with geometrical frustration can stabilize topological spin textures without DMI. We have grown high-quality layered triangular-lattice intermetallics RNiAl4Ge2 (R = Tb, Dy, Ho, Er), which exhibit multiple field/temperature-driven transitions and strong anisotropy, pointing to distinct crystal-electric-field (CEF) ground states across the series. We aim to use inelastic neutron scattering (INS) performed on MERLIN or MARI to map CEF excitations of rare earth ions and determine these materials single-ion Hamiltonians, thereby quantitatively linking single-ion anisotropy to the observed phase behavior

Principal Investigator: Dr Erxi Feng
Local Contact: Dr Viviane Pecanha Antonio
Experimenter: Miss donger Cheng
Experimenter: Dr Xiao Wang
Experimenter: Dr Yixi Su
Experimenter: Dr Li Lin
Local Contact: Dr Devashi Adroja

DOI: 10.5286/ISIS.E.RB2610314

ISIS Experiment Number: RB2610314

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 Erxi Feng et al; (2026): Observation of the crystal-electric-field excitations in the frustrated triangular metal RNiAl4Ge2 (R = Tb, Dy, Ho, Er)., STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610314

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