Magnetic Properties of URu_{1-x}Pd_{x}Ge Solid Solutions

Abstract

The magnetic properties of the solid solutions URu1−xPdxGe with x = 0.1 0.9, crystallizing in the orthorhombic TiNiSi-type structure, were investigated by ac magnetic susceptibility and dc magnetization measurements. The experimental data reveal that there are three dierent regions of magnetic behaviour. A nonmagnetic ground state occurs for x < 0.3, however, as the Pd concentration is increased, the antiferromagnetism is stabilized for x = 0.35 0.8, and two successive transitions, antiferro-and ferromagnetic, emerge in the x = 0.9 composition.

Thermoelectric Power of the URu1-xPdxGe System

“…2c) exhibits a positive S(T ) curve at low temperatures. For this alloy, we observe also a broad maximum at 36 K, nearby its magnetic phase transition (T C = 30 K [3]). …”

“…The samples of URu 1−x Pd x Ge investigated in this work were the same as reported in [3]. The samples were cut into parallelepiped bars with typical dimensions 1 × 1 × 6 mm 3 .…”

“…Measurements of magnetization, M (T ), specic heat, C p (T ), and electrical resistivity, ρ(T ), have revealed a dramatic change in their ground-state magnetic properties; from non-magnetic (x < 0.35), through antiferromagnetic (x = 0.35−0.8) to a complex magnetic state with two successive magnetic phase transitions in x = 0.9 and 1. It is remarkable that compositions located at the nonmagnetic-magnetic border were found to exhibit typical non-Fermi-liquid properties, such as [3,4]. To shed more light on the electron transport properties, we present in this contribution experimental data of thermoelectric power for URu 1−x Pd x Ge and discuss them in the frameworks of the existing theories.…”

Non-Fermi-Liquid State in URu0.68Pd0.32Ge

“…Sample URu 0.68 Pd 0.32 Ge was prepared and characterized with the same procedure reported previously [3]. Xray diraction analysis indicated the sample to be a single phase with the room temperature lattice parameters * corresponding author; e-mail: V.H.Tran@int.pan.wroc.pl a = 0.619 nm, b = 0.4357 nm and c = 0.7548 nm.…”

“…In order to investigate magnetic phase diagram as well as to search for a quantum critical point we have synthesized and performed measurements of X-ray diraction, dc-magnetization M , ac-susceptibility χ ac (T ), specic heat C p (T ) and electrical resistivity ρ(T ) of solid solutions URu 1−x Pd x Ge [3]. We found that the alloys crystallize in the orthorhombic TiNiSi-type structure (space group P nma).…”