because of urgent needs of groundwater resources in the tochal region of north tehran, an integration of electric and electromagnetic methods was applied to investigate the location and the direction of water bearing fractures. first, the vlf electromagnetic profiling was performed on suitable places and two locations were detected for supplementary resistivity surveys. then, a number of vertic...

The effect of film thickness on the resistivity of thin, evaporated copper films (approximately 10–150 nm thick) was determined from sheet resistance, film thickness, and mean grain-size measurements by using four-point probe, profilometer, and electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) methods, respectively. The resistivity of these films increased with decreasing film...

Structural study by means of x-ray powder diffraction and Laue technique show that UIrGe crystallizes in the orthorhombic TiNiSi-type structure. Magnetic measurements reveal a huge magnetic anisotropy in UIrGe with the hard magnetization axis along the a axis, i.e., along the direction of U-U zig-zag chains. Comprehensive magnetic, electrical-transport, thermopower, and thermal studies on a sin...

Measurements of the mechanical and electrical properties of Nafion and Nafion/titania composite membranes in constrained environments are reported. The elastic and plastic deformation of Nafion-based materials decreases with both the temperature and water content. Nafion/titania composites have slightly higher elastic moduli. The composite membranes exhibit less strain hardening than Nafion. Co...

We present an electrical transport study of the 2-dimensional (2D) organic conductor τ -(P-(S,S)-DMEDT-TTF)2(AuBr)2 (AuBr2)y (where y ∼ 0.75) at low temperatures and high magnetic fields. The inter-plane resistivity ρzz increases with decreasing temperature, with the exception of a slight anomaly at 12 K. Under a magnetic field B, both ρzz and the in-plane resistivity plane ρxx show a pronounce...

The topological Hall effect (THE) in annealed Pd/CoZr/MgO multilayers was investigated and disentangled the temperature range of 50–300 K. anomalous curves change polarity with decreasing temperature. Moreover, crests troughs develop curves. resistivity is obtained by subtracting ordinary resistivities from dependence total transverse resistivity. interfacial Dzyaloshinskii–Moriya interaction (...

The thermoelectric properties, including electrical resistivity ~r!, Seebeck coefficient (S), and thermal conductivity ~k! on binary icosahedral Cd-Yb quasicrystals and Cd6Yb are investigated. The Cd-Yb quasicrystals have a room-temperature ~RT! resistivity value of about 200 ~mV cm!, however, the temperature-dependent resistivity is sensitive to a small composition change in these compounds. F...

We report transport and thermodynamic properties of stoichiometric single crystals of the hexagonal iron-pnictide FeCrAs. The in-plane resistivity shows an unusual “non-metallic” dependence on temperature T , rising continuously with decreasing T from ∼800 K to below 100 mK. The c-axis resistivity is similar, except for a sharp drop upon entry into an antiferromagnetic state at TN ∼ 125 K. Belo...