Unusual Ordering Behavior in Single-CrystalU2Rh3Si5

Coupled spin-lattice transition inU2Rh3Si5

“…Recently Becker et al 10 have grown well-characterized single crystals of a new uranium compound, U 2 Rh 3 Si 5 , and investigated its bulk physical properties, i.e., specific heat, magnetic susceptibility and electrical resistivity. U 2 Rh 3 Si 5 forms in the monoclinic Lu 2 Co 3 Si 5 structure with space group C2/c.…”

“…Due to the magnetic ordering, the Fermi surface reconstructs 13 as is indicated by the observed steps in the electrical conductivity. 10 Since the density of states at E F directly influences the electronic contribution to ␣ i (T), this reconstruction could lead to the large c-axis expansion which tracks the volume change.…”

“…In fact, smooth changes in susceptibility and resistivity measurements have also been attributed to CEF. 10 The influence of the CEF on the thermal expansion has been recently studied in orthorhombic ErCu 2 . A knowledge of the CEF parameters and the elastic constants enables Gratz et al 14 Although in the paramagnetic state the thermal expansion behavior of U 2 Rh 3 Si 5 is governed by the CEF, at T 0 additional ''bootstrapping'' interactions come into play and lead to the single first-order transition.…”

Antiferromagnetic ordering in the Kondo lattice systemYb2Fe3Si

“…here that the properties of the 2-3-5 silicides are highly anisotropic [15] and the over all shape of the temperature dependence of ρ(T) of a polycrystal can easily be influenced by the anisotropy. The important aspect is the the low temperature ρ data on an expanded scale as shown by the inset (b).…”

Magnetic properties of ferromagnetic Pu2Pt3Si5

“…Considering the actinide-based materials only, few systems are reported and even less, essentially Th and U based systems [22][23][24], have been examined extensively. For instance, only U 2 Rh 3 Si 5 has been produced in a single crystal form what was crucial to understand the unusual character of the magnetic phase transition at 25.6 K [25] which appears to be of first order and strongly coupled to the lattice [26]. In the case of transuranium based compounds even fewer systems are reported and essentially only their crystallographic parameters are known [22].…”