Pressure effect on magnetism in CeTe${}_{1.82}$

Abstract

We report the normal-state transport and magnetic properties of a pressure-induced superconductor CeTe${}_{1.82}$. We found that the applied pressure is required to increase the Kondo temperature scale ($T_{\mathrm{K}}^{\ast }\sim$ 170 K), associated with the two-dimensional motion of the carriers confined within the Te plane. Both the short-range ferromagnetic ordering temperature ($T_{\mathrm{SRF}}\sim$ 6 K) and the long-range antiferromagnetic transition temperature ($T_{\mathrm{N}}\sim$ 4.3 K) are slightly increased with pressure. We suggest that the application of pressure enhances a coupling between the 4$f$ and conduction electrons. We also found that the field effect on the transport under pressure is analogous to that at ambient pressure, where a large magnetoresistance is observed in the vicinity of $T_{\mathrm{SRF}}$.

9 pages, including 4 figures