Inelastic neutron scattering and muon spin relaxation investigations of the deuterated Kondo lattices CeNiSnDx
ADROJA, Devashibhai
University of Johannesburg [South Africa] [UJ]
ISIS Neutron and Muon Source [ISIS]
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University of Johannesburg [South Africa] [UJ]
ISIS Neutron and Muon Source [ISIS]
ADROJA, Devashibhai
University of Johannesburg [South Africa] [UJ]
ISIS Neutron and Muon Source [ISIS]
University of Johannesburg [South Africa] [UJ]
ISIS Neutron and Muon Source [ISIS]
HILLIER, Adrian
ISIS Neutron and Muon Source [ISIS]
ISIS Neutron and Muon Source [ISIS]
YUAN, Hui
Center for Correlated Matter and School of Physics [CCM]
State Key Laboratory of Silicon Materials
< Reduce
Center for Correlated Matter and School of Physics [CCM]
State Key Laboratory of Silicon Materials
Language
en
Article de revue
This item was published in
Physical Review B. 2024, vol. 109, n° 6, p. 064401
American Physical Society
English Abstract
CeNiSn is a Kondo semimetal where a gap opens at low temperatures due to hybridization between 4f and conduction electrons, but a full insulating state fails to develop. Upon the insertion of hydrogen, long-range magnetic ...Read more >
CeNiSn is a Kondo semimetal where a gap opens at low temperatures due to hybridization between 4f and conduction electrons, but a full insulating state fails to develop. Upon the insertion of hydrogen, long-range magnetic order is induced. Here we report zero-field muon spin relaxation and inelastic neutron scattering measurements of polycrystalline samples of the deuterides CeNiSnDx (x=1.0,1.8). The muon spin relaxation results confirm magnetic ordering in the whole sample of CeNiSnD below around 4.7 K, while inelastic neutron scattering reveals two well-defined crystalline-electric field (CEF) excitations at around 13 and 34 meV in CeNiSnD, and 5 and 27 meV for CeNiSnD1.8. These results suggest that hydrogenation leads to the localization of the Ce-4f electrons, giving rise to long-range magnetic order. We propose CEF level schemes for both systems, which predict a ground-state moment of 0.96μB/Ce within the ab plane for CeNiSnD1.8 and a saturated moment of 1.26μB/Ce along the easy c axis for CeNiSnD, that account for the observed magnetic properties.Read less <
English Keywords
Antiferromagnetism
Heavy-fermion systems
Inelastic neutron scattering
Muon spin relaxation & rotation
Hydrogenated materials
Origin
Hal imported