Tricritical phenomena at the gamma-->alpha transition in Ce0.9-xLaxTh0.1 alloys |
| |
Authors: | Lashley J C Lawson A C Cooley J C Mihaila B Opeil C P Pham L Hults W L Smith J L Schmiedeshoff G M Drymiotis F R Chapline G Basu S Riseborough P S |
| |
Institution: | Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. |
| |
Abstract: | The gamma-->alpha isostructural transition in the Ce0.9-xLaxTh0.1 system is measured as a function of La alloying using specific heat, magnetic susceptibility, resistivity, thermal expansivity or striction measurements. A line of discontinuous transitions, as indicated by the change in volume, decreases exponentially from 118 K to close to 0 K with increasing La doping, and the transition changes from being first-order to continuous at a critical concentration, x(c) approximately 0.14. At the tricritical point, the coefficient of the linear T term in the specific heat gamma and the magnetic susceptibility increase rapidly near x(c) and approach large values at x=0.35 signifying that a heavy Fermi-liquid state evolves at large doping. The Wilson ratio reaches a value above 2 for a narrow range of concentrations near x(c), where the specific heat and susceptibility vary most rapidly with the doping concentration. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|