Complex magnetic phase diagram of CePd_{2-x}Ni_xAl_3 around its critical concentration
| dc.creator | Sereni, J. G. | |
| dc.creator | Pedrazzini, P. | |
| dc.creator | Bauer, E. | |
| dc.creator | Galatanu, A. | |
| dc.creator | Aoki, Y. | |
| dc.creator | Sato, H. | |
| dc.date | 2004-03-04 | |
| dc.date.accessioned | 2026-07-07T02:56:47Z | |
| dc.date.available | 2026-07-07T02:56:47Z | |
| dc.description | Thermal, magnetic and transport measurements are reported on CePd_{2-x}Ni_xAl_3 in the 0<= x <= 1 range, including the effect of pressure (p) and magnetic field on some selected samples. The low temperature results indicate that long range antiferromagnetic order is stable up to x=0.2, while between 0.25 and 0.5 magnetic disorder gives rise to non-Fermi-liquid (NFL) behavior. In this region, the low temperature specific heat can be described by the sum of two components, the major one showing a C_P/T=gamma_0 -gamma_1 T^(1/2) dependence, while the minor one includes a decreasing number of degrees of freedom related to a residue of short range order. The latter extrapolates to zero between 0.45<x_{cr}<0.5. Electrical resistivity (rho) studies performed under pressure for x=0.5 allow to investigate the evolution of the NFL state right above the critical point, where the exponent of rho ~ T^n is found to increase from n=1 (for p=0) up to n=2 (for p=12 kbar). The latter is observed for x=1.0 already at normal pressure, indicating the onset of the Fermi Liquid behavior. Doping and pressure effects are compared by fitting high temperature resistivity data employing a unique function which allows to describe the evolution of the characteristic energy of this series through a large range of concentration and pressure. | |
| dc.description | 7 pages, 8 figures, submitted to Phys. Rev. B | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0403154 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0403154 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23463 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Complex magnetic phase diagram of CePd_{2-x}Ni_xAl_3 around its critical concentration | |
| dc.type | text |