Complex conductivity:

Electrical conductivity of materials exposed to garden area analysis, it is necessary to treat conductivity as a complex number (or complex numbers as a matrix, anisotropic material in terms of the above) called admittivity. In this method, such electrical impedance tomography applications, industrial and medical imaging is used as a type. Sum of a real component and an imaginary conductivity Admittivity component susceptivity name is called.

An alternative description of reaction currents turn uses a real (but frequency dependent conductivity), with a real permittivity. Big conductivity, and quickly turn - absorbed by the current signal content (ie, more opaque material). For information, transparency of the mathematical details.

Temperature dependence:

Electrical conductivity depends strongly on temperature. In metals, electrical conductivity decreases with increasing temperature, while in semiconductors, electrical conductivity increases with increasing temperature. Over a limited temperature range, electrical conductivity is directly proportional to temperature as can be approximated. At different temperatures in order to compare electrical conductivity measurements, they need a common temperature is standardized. Conductivity as a shield This dependence often expressed - versus - temperature graph, which can be written as: Where ST a 'normal temperature,' T is the electrical conductivity ST a measured temperature, T is the electrical conductivity Slope temperature compensation is a material, Absolute temperature T is measured, 'T is temperature. The natural water temperature compensation for the slope about 2% / degree Celsius, but this (1 to 3)% / ° C can range between the geochemistry is affected by slope, and easily can set in a laboratory.

Extremely low temperature (not absolute zero till now), some stuff for one incident too many electrical conductivity show called superconductivity was found.