The magnetic susceptibility of single crystalline samples of CeT2Al10 (T=Ru, Os) showing unusual phase transitions at T0 27 K and 29 K, respectively, has been measured up to 700 K along the three principal axes of the orthorhombic structure. The crystal field analysis of the data led to the crystal field scheme with excited levels at 326 K and 530 K for T Ru and 433 K and 704 K for T Os. For the ground state, the butterfly-like wave function elongates along the b-axis in the distorted hexagon composed of Al(3) and Al(4) atoms in the b-c plane. This charge distribution allows the 4f electron state to hybridise with the 3p states of the Al(3) and Al(4) atoms. We propose that this hybridisation plays an important role in both the formation of the hybridisation gap and the enhancement of the antiferromagnetic ordering temperature.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2012|
|Event||International Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom|
Duration: 2011 Aug 29 → 2011 Sep 3
ASJC Scopus subject areas
- Physics and Astronomy(all)