Neutron scattering and μSR studies on a Kondo lattice heavy fermion CeRuSn3

International Conference on Strongly Correlated Electron Systems 2014

Anand, V.K.^1,2 ; Adroja, D.T.^1,3 ; Bhattacharyya, A.^1,3 ; Hillier, A.D.^1 ; Britz, D.^3 ; Strydom, A.M.^3 ; Taylor, J.W.^1 ; Fraile, A.^1 ; Kockelman, W.^1

ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon

OX11 0QX, United Kingdom^1

Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, Berlin

D-14109, Germany^2

Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park

2006, South Africa^3

关键词: Antiferromagnetic orderings;    Crystal field effects;    Heavy fermion;    Heavy fermion systems;    Kondo lattices;    Kondo temperatures;    Long range magnetic order;    Muon spin relaxation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012008/pdf
DOI  :  10.1088/1742-6596/592/1/012008

来源: IOP

【 摘 要 】

Kondo lattice heavy fermion system CeRuSn3exhibits anomalies in magnetic susceptibility and specific heat at a temperature T ≈ 0.6 K (much lower than the average Kondo temperature TK≈ 3.1 K) which are thought to be related to antiferromagnetic ordering or spin-glass transition. Our muon spin relaxation (μSR) data show no clear evidence of long range magnetic order in CeRuSn3down to 84 mK. However, it reveals a slowing down of spin fluctuations below 0.6 K, and a glassy spin-dynamics seems more appropriate. The inelastic neutron scattering data reveal broad excitations around 6-8 meV due to the crystal field effect.