Low temperature magnetic phase diagram of the cubic non-Fermi liquid system CeIn_(3-x)Sn_x

P. PEDRAZZINI; M. GÓMEZ BERISSO; N. CAROCA-CANALES; M. DEPPE; C. GEIBEL; J. G. SERENI

EUROPEAN PHYSICAL JOURNAL B - CONDENSED MATTER

EDP Sciences

Año: 2004 vol. 38 p. 445 - 450

1434-6028

In this paper we report a comprehensive study of the magnetic susceptibility (χ), resistivity (r), and specific heat (CP), down to 0.5 K of the cubic CeIn3-xSnx alloy. The ground state of this system evolves from antiferromagnetic (AF) in CeIn3 (TN=10.2K) to intermediate-valent in CeSn3, and represents the first example of a Ce-lattice cubic non-Fermi liquid (NFL) system where TN(x) can be traced down to T=0 over more than a decade of temperature. Our results indicate that the disappearance of the AF state occurs near xc≈0.7, although already at x≈0.4 significant modifications of the magnetic ground state are observed. Between these concentrations, clear NFL signatures are observed, such as r(T)≈r0+ATn (with n<1.5) and CP(T)µ−T ln(T) dependencies. Within the ordered phase a first order phase transition occurs for 0.25<x<0.5. With larger Sn doping, different weak r(T) dependencies are observed at low temperatures between x=1 and x=3 while CP/T shows only a weak temperature dependence.