The effect of Zn substitution on the DC electrical resistivity, AC electrical conductivity and microstructure of V2O5 doped Zn(1-x)NixFe2O4 with x=0.0, 0.1, 0.2, 0.3, 0.4 (5 samples) were prepared by conventional ceramic technique has been investigated. The structural characterization of nickel-zinc ferrites were done by X-ray diffraction technique. Micro-structural and morphological studies we...

Geo-electrical resistivity techniques have been employed in the High Barind as a reconnaissance investigation for the subsurface lithology. Out of 13 upazillas, comprising the Barind tract, Sapahar and Porsha Upazillas, situated in the High Barind are badly affected by water shortage. Vertical electrical soundings (VES) were executed using Schlumberger configuration in different areas taking th...

The study of the electrical resistivity ρL of alkali Na-based binary alloys Na1−xLix, Na1−xKx, Na1−xRbx and Na1−xCsx have been made by well-recognized model potential of Gajjar et al. The most recent exchange and correlation functions due to Farid et al (F) and Sarkar et al (S) are used for the first time in the study of electrical resistivity of liquid binary mixtures and found suitable for su...

Oblique-angle deposition of indium tin oxide (ITO) is used to fabricate optical thin-film coatings with a porous, columnar nanostructure. Indium tin oxide is a material that is widely used in industrial applications because it is both optically transparent and electrically conductive. The ITO coatings are fabricated, using electron-beam evaporation, with a range of deposition angles between 0 d...

Accurate estimation of capillary pressure and relative permeability curves are very important for evaluating hydrocarbon recovery processes. Also, resistivity index data are important in evaluating fluid distributions in reservoirs during these processes. All these parameters are path dependent i.e. different in drainage and imbibition processes, commonly known as hysteresis, which makes them c...

Experimental evidence has made it clear that the size of an object can have an effect on its properties. The electrical resistivity of a thin film will become larger as the thickness of that film decreases in size. Furthermore, the electrical resistivity will also increase as the temperature increases. To help understand these relationships, a model is presented, and equations are obtained to h...

The resistivity of p-type ZnSe:N/GaAs heteroepitaxial layers grown by molecular beam epitaxy using a nitrogen free-radical source has been determined as a funct:ion of both substrate temperature and the Zn-to-Se beam equivalent pressure (BEP) ratio employed during growth, Layer resistivities were determined using a noncontact inductive-coupling radiofrequency measurement technique that provided...

The observation of a substitution-induced ferromagnetic order ~Tc5200 K! is reported in antiferromagnetic La0.9Sr0.1MnO3 ~TN5130 K! when 0.05 of La is replaced by yttrium. Important results of ferromagnetic resonance ~FMR! and high-pressure transport studies are as follows. ~i! Data on FMR linewidth and resistivity provide evidence for the presence of microscopic magnetic inhomogeneities, possi...

An apparatus capable of rapid measurement of the Seebeck coefficient and electrical resistivity at room temperature is reported. The novel aspect of this apparatus is the use of 4 multifunctional probes that comprise a junction of two conductors at the tip and serve as both thermocouples and electrical contacts. In addition, one of the probes has a built-in heater that can establish a temperatu...

X-ray absorption fine structure ~XAFS! measurements as a function of temperature have been carried out at the Mn K edge for La0.7Ca0.3Mn12xTixO3 and La0.7Ca0.3Mn12yGayO3 (x and y50.01 to 0.10! and correlated with transport and magnetization measurements. Most samples exhibit colossal magnetoresistance ~CMR! at low temperature. The magnetization data show a concentration dependence: the ferromag...