Short-range magnetic ordering in URh0.7Ru0.3Ge

• Published in: Journal of physics. Condensed matter Vol. 19; no. 9; pp. 096201 - 096201 (10)
• Main Authors: Tran, V H, Miiller, W, Baenitz, M, Steglich, F
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 07.03.2007; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Physics; Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.); Spin glasses; Frequency dependence; Electrical conductivity; Magnetic ordering; Spin fluctuations; Long-range order; Spontaneous magnetization; Rhodium alloys; Ruthenium alloys; Actinide alloys; Magnetic susceptibility; Spin freezing; Specific heat; Germanium alloys; Stoner model; Uranium alloys; Short-range order; Magnetic properties
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/19/9/096201

The magnetic properties of URh0.7Ru0.3Ge were investigated by means of ac susceptibility, dc magnetization, specific heat and electrical resistivity measurements. We observed a maximum of the ac susceptibility at Tmax = 2.9 K and its frequency dependence, but no spontaneous magnetization at 2 K. An alternative scenario for the observed feature, for example, spin-glass freezing, is not confirmed by dc field dependences of the ac susceptibility and dc magnetization. The data from specific heat and electrical resistivity studies down to 2 K do not suggest long-range magnetic ordering, and point to spin-fluctuation behaviour of the alloy. We have estimated a spin-fluctuation temperature of ~27 K and Stoner enhancement factor of ~490. The experimental data are discussed in the framework of spin-fluctuation theories.