Magnetic and Fermi Surface Properties of UPtGa₅

Thermodynamic and transport properties of single-crystallineUMGa5(M=Fe,Moreno1, Bauer2, Sarrao3 et al. 2005Phys. Rev. B334210View full textAdd to dashboardCite

“…The curves are typical of antiferromagnets and the anisotropy is modest ͑M ab / M c ϳ 1.1-2͒ in the antiferromagnetic ͑AFM͒ state, generally consistent with previous reports. 17,21,23 However, the near isotropy of the M͑H͒ curves of UPdGa 5 is somewhat different than found previously. 23 The magnetization in the ab plane is always largest, suggesting that it is easier to cant the moments that lie along the c axis in all three compounds 17,22,23 into the ab plane than to rotate them to all align along the c axis.…”

“…20 The initial description of the UMGa 5 compounds reported only a structural determination and magnetic susceptibility data at temperatures above 80 K on principally polycrystalline samples. 14 Subsequent studies have revealed that UNiGa 5 , UPtGa 5 , and UPdGa 5 order antiferromagnetically; [21][22][23] whereas, itinerant paramagnetic behavior is observed for the UMGa 5 materials with other transition metals. Significant recent effort has been devoted to understanding the nature of the ordered compounds as well as to the evolution of the Fermi surface across many of these compounds as a function of transition metal.…”

“…Significant recent effort has been devoted to understanding the nature of the ordered compounds as well as to the evolution of the Fermi surface across many of these compounds as a function of transition metal. 17,18,21,23,24 Here, we present a comprehensive study of magnetic susceptibility, specific heat, and electrical resistivity properties on the complete set of UMGa 5 ͑M =Fe,Co,Ni, Ru, Rh, Pd, Os, Ir, Pt͒ compounds, with all measurements performed on single crystals. In addition, we present results obtained with a simple tight-binding model that provides semi-quantitative insights into the role of f-ligand hybridization effects in explaining both the evolution of T N for the ordered magnetic systems and the evolution of the paramagnetic behavior in the nonmagnets.…”

Single-crystal growth and physical properties of URhIn5

“…10,11 Consistent with this, the Fermi surfaces of the uranium 115 compounds experimentally determined by means of de Haas-van Alphen (dHvA) or angular-resolved photoemission (ARPES) are well explained by band calculations where 5f electrons are treated as band electrons, namely 5f electrons can be regarded as itinerant. [12][13][14][15][16][17][18] Among them, URhGa 5 is a nonmagnetic metal with semimetallic behavior. 16 Its magnetic susceptibility is almost constant as a function of temperature, in contrast to the magnetic ground state observed in NpRhGa 5 19,20 and the temperature-dependent paramagnetic behavior in the superconductor PuRhGa 5 .…”

Zero-field NMR and NQR measurements of the antiferromagnet URhIn5

“…[19][20][21] On the other hand, in the U115 and Np115 series, which are Pauli paramagnets or antiferromagnets, no superconductivity has been found. [22][23][24][25][26][27][28][29][30][31][32][33][34] In U115 systems, only gallium compounds have been reported. A search for isomorphic U115 indium compounds succeeded in the discovery and growth of single crystals of URhIn 5 .…”