Ferromagnetic spin-glass behaviour in single-crystalline U2 IrSi3.

A single crystal of the U-based ternary silicide U(2)IrSi(3) was investigated by means of magnetic, resistivity and heat-capacity measurements performed in wide ranges of temperature and external magnetic fields. The results hint at the formation of a non-trivial magnetic ground state in which ferromagnetic ordering coexists with spin-glass freezing.

Disorder-driven non-Fermi liquid behavior in single-crystalline Ce2Co0.8Si3.2.

A single crystal of the Ce-based ternary silicide Ce2Co0.8Si3.2, which crystallizes with a hexagonal AlB2-type related structure, was studied by means of magnetization, resistivity and heat capacity measurements. The compound was characterized as a Kondo paramagnet down to 0.4 K. Its low-temperature behavior is dominated by distinct non-Fermi liquid features, most likely arising due to structural disorder in the nonmagnetic-atom sublattice.

Disorder-driven low-temperature anomalies in single-crystalline Ce2Co0.4Rh0.4Si3.2.

A single crystal of the cerium-based solid solution Ce2Co0.4Rh0.4Si3.2 was investigated by means of magnetic, resistivity and heat capacity measurements in wide ranges of temperature and external magnetic field. Our results confirmed that the phase remains paramagnetic down to 0.4 K. At low temperatures, some anomalous features due to intrinsic crystallographic disorder in the compound were observed.

Superconductivity in the Einstein solid VAl(10.1).

We used magnetic susceptibility, resistivity and heat capacity measurements to characterize the superconducting state in the Einstein solid VAl(10.1). We find that VAl(10.1) is a weak-coupling, type-II superconductor with T(c) = 1.53 K and an upper critical field of H(c2)(0) = 800 Oe. The heat capacity data in the range 0.07 K < T < 1.53 K are consistent with an isotropic energy gap of Δ(0) = 0.23 meV.