Electrical resistivity across the tricriticality in itinerant ferromagnet

We investigate the discontinuous ferromagnetic phase diagram near tricritical point in UCo 1-x Ru x Al compounds by electrical resistivity measurements. Separation of phases in UCo 0.995 Ru 0.005 Al at ambient pressure and in UCo 0.990 Ru 0.010 Al at pressure of 0.2 GPa and disappearance of ferromagnetism at 0.4 GPa is confirmed. The exponent of temperature dependence of electrical resistivity implies change from Fermi liquid behavior to non-Fermi liquid at 0.2 GPa and reaches minimum at 0.4 GPa. Our results are compared to results obtained on the pure UCoAl and explanation for different exponents is given

Anisotropic Magnetic Properties of URhIn 5

We report on synthesis and anisotropic physical properties of URhIn$_{5}$. High quality single crystals were grown in In-flux. The compound undergoes a second order phase transition into an antiferromagnetic state at T$_{\textrm{N}}$ = 98 K. The transition is field independent up to 9 T. An increase of the resistivity $\rho$ with j along the [100], [110] and [001] tetragonal axis indicates a spin-density-wave induced order with the gap opening first along the [001] direction. The magnetic susceptibility $\chi$ = M/H exhibits a strong anisotropy. Above T $=$ 200 K, $\chi$(T) follows Curie-Weiss law with the effective moment of $\mu_{\textrm{eff}}$ = 3.71 $\mu_{\textrm{B}}/$U and the Weiss temperatures of $\theta_{\textrm{P}}^{[100]} = -900$ K and $\theta_{\textrm{P}}^{[001]} = -500$ K for H $\parallel$ [100] and H $\parallel$ [001] respectively. The characteristic Kondo-like temperature for URhIn$_{5}$ yields T$_{\textrm{K}} =$ 125 K