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In this paper we report a comprehensive study of the magnetic susceptibility(\chi), resistivity (\rho), and specific heat (C_P), down to 0.5 K of the cubicCeIn_(3-x)Sn_x alloy. The ground state of this system evolves fromantiferromagnetic (AF) in CeIn_3(T_N=10.2 K) to intermediate-valent in CeSn_3,and represents the first example of a Ce-lattice cubic non-Fermi liquid (NFL)system where T_N(x) can be traced down to T=0 over more than a decade oftemperature. Our results indicate that the disappearance of the AF state occursnear x_c ~ 0.7, although already at x ~ 0.4 significant modifications of themagnetic ground state are observed. Between these concentrations, clear NFLsignatures are observed, such as \rho(T)\approx \rho_0 + A T^n (with n<1.5) andC_P(T)\propto -T ln(T) dependencies. Within the ordered phase a first orderphase transition occurs for 0.25 < x < 0.5. With larger Sn doping, differentweak \rho(T) dependencies are observed at low temperatures between x=1 and x=3while C_P/T shows only a weak temperature dependence.Comment: 7 pages, 7 figures. Accepted in Eur. J. Phys.

Low temperature magnetic phase diagram of the cubic non-Fermi liquid system CeIn $\mathsf{_{3-x}}$Sn$\mathsf{_x}$