Electrical transport in UNi0.5Sb2 single crystals

Specific heat and isothermal magnetocaloric effect inUNi0.5Sb2

“…In turn, the small feature at T tr = 63.5 K corresponds to the anomalies in the temperature-dependent magnetic susceptibility and electrical resistivity, which have tentatively been attributed in Ref. 3 to a change in the magnetic structure.…”

“…1 Their electronic properties have been studied in the past on polycrystalline and powder samples by means of electrical, magnetic, Mössbauer, and neutron diffraction measurements. 2,3 Most of the compounds were found to order magnetically at low temperatures and to reveal features in their transport behavior, which are characteristic of Kondo lattices with strongly screened magnetic moments.…”

“…For example, in the case of antiferromagnetic UNiSb 2 ͑T N = 175 K͒ the crystal structure refinement from the single-crystal x-ray data indicated a large deficiency on the crystallographic sites occupied by Ni atoms, yielding the composition UNi 0.5 Sb 2 . 4 Concurrently, magnetic measurements revealed more complex behavior of single crystals in comparison to polycrystalline samples, with the most notable feature, absent in the latter ones, of an order-order phase transition occurring at T tr Ϸ 63 K-i.e., much below the Néel temperature T N = 161 K. 3 The 121 Sb Mössbauer studies determined the magnetic structure to be of antiferromagnetic ͑AF͒ II type, with the uranium magnetic moments pointing along the tetragonal c axis and forming ͑ϩ Ϫ Ϫ ϩ͒ sequence of ferromagnetically coupled ͑001͒ planes. 2 In this paper we report the results of heat-capacity measurements on a single crystal of UNi 0.5 Sb 2 , performed in an applied magnetic field, with the main emphasis on the temperature regions in the vicinity of T tr and T N .…”

Calculated electronic structure and measured X-ray photoemission spectrum of UAuSb2

“…The first studies of UTSb 2 series have been performed on the polycrystalline samples [3] and very recently some of these ternaries with T = Co [4,5], Ni [6,7] and Cu [8] on single-crystalline samples. Most of UTSb 2 compounds have been found to order magnetically at low temperatures and characterized as semimetallic Kondo lattices with strongly screened uranium magnetic moments [3][4][5][6][7][8].…”

“…Most of UTSb 2 compounds have been found to order magnetically at low temperatures and characterized as semimetallic Kondo lattices with strongly screened uranium magnetic moments [3][4][5][6][7][8]. They have first of all revealed a strong competition of the crystal field effects with the Kondo-like and magnetic order interactions.…”