Role of Ce sublattices in the thermal and magnetic properties of Ce{sub 7}X{sub 3} (X = Ni, Ru, Rh, Ir, Pd and Pt) compounds
- CNEA, Rio Negro (Argentina)
- Universite Louis Pascal, Strasbourg (France)
The role of the Ce sublattices in the thermal and magnetic properties of the Ce{sub 7}X{sub 3} (X = Ni, Ru, Rh, Ir, Pd, and Pt) family of compounds is studied by means of ac and dc magnetic susceptibility, magnetization and mainly specific-heat experiments in applied magnetic field. The experimental data show that in these compounds there is coexistence of magnetic order, heavy-fermion and intermediate-valence behavior, which is interpreted in terms of the contribution of the three different sublattices present in the crystalline structure of Th{sub 7}Fe{sub 3}-type (denoted by 1Ce{sub I}, 3Ce{sub II} and 3Ce{sub III}). From the available volume of the Ce{sub III} atoms in their crystallographic environment it is found that sublattice Ce{sub III} has an intermediate-valence behavior, whereas from entropic considerations sublattices Ce{sub I} and Ce{sub II}, are identified as responsible for the magnetic order or heavy-fermion behavior, depending on the Ce-ligand electronic structure. This systematics evidences a clear correlation between the thermal and magnetic properties of these compounds and the position of the respective Ce-ligands in the periodic table, through the particular sensitivity of Ce to the environmental conditions.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 569752
- Journal Information:
- Journal of Low Temperature Physics, Vol. 108, Issue 1-2; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Systematic study of mixed valent behavior: resistivity, specific heat, and magnetic susceptibility of Ce(Rh/sub 1-y/Pt/sub y/)/sub 2/ and Ce(Rh/sub 1-x/Ru/sub x/)/sub 2/
Resistive behavior and intermediate valence effects in La/sub 1-x/Ce/sub x/Pd/sub 3/ and CePd/sub 3-x/Rh/sub x/