Volume 62, Number 2, April 2003
|Page(s)||251 - 256|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 April 2003|
Crystal-field levels in pure and diluted studied by neutron inelastic scattering technique
Institute of Industrial Science, The University of Tokyo Meguro,
Tokyo 153-8505, Japan
2 RIKEN Harima Institute - Mikazuki, Sayo, Hyogo 679-5148, Japan
3 Swiss Light Source, Paul Scherrer Institute - CH-5232 Villigen, Switzerland
4 Laboratory for Neutron Scattering, ETH & PSI - CH-5232 Villigen PSI, Switzerland
5 Physical Chemistry, Saarland University - D-66123 Saarbrucken, Germany
Corresponding author: email@example.com
Accepted: 17 February 2003
Inelastic neutron scattering experiments on and have been performed. The results enable us to infer important properties of the crystal-field levels of in which has fascinating structural and magnetic properties that are attributed to the electronic states of the ion. While no clear excitation was observed in pure , three excitations from the ground state with the energies 1.4, 4.1 and 5.8 meV were observed in . By comparing the present results with the previous crystal-field calculation, we infer that the ground state of in is which is split into two Kramers doublets by the tetragonal potential. Additionally, the heat capacity measured on the diluted system is compared with a calculation using the low part of the energy level scheme obtained from the neutron experiments. Good agreement between theory and experiment is obtained.
PACS: 71.70.Ch – Crystal and ligand fields / 78.70.Nx – Neutron inelastic scattering / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EDP Sciences, 2003
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