Results 101 to 110 of about 784 (125)

Benchmarking break-junction techniques: electric and thermoelectric characterization of naphthalenophanes.

open access: yesNanoscale
Hurtado-Gallego J   +9 more
europepmc   +1 more source

Resistivity, hall coefficient and thermopower in Mg70Cu30-,Zn (0 ⩽ x ⩽ 30) metallic glasses

open access: closedJournal of Non-Crystalline Solids, 1987
Electrical resistivity. Hall coefficient and thermopower have been measured on Mg70Cu30-xZnx (0 ⩽ x ⩽ 30) ternary metallic glasses in the temperature range 77–800 K. We revealed that the resistivity and the Hall coefficient at 300 K exhibit a common feature in their composition dependences, but the thermopower behaves entirely in a different manner. By
U. Mizutani, T. Matsuda
openaire   +2 more sources

Aging study of nickel-copper-manganite negative temperature coefficient thermistors by thermopower measurements

open access: closedJournal of Applied Physics, 1992
Ceramic nickel-copper-manganite based negative temperature coefficient thermistors are unstable under thermal constraint, which increases the resistivity of these devices. This unstability can be reduced by the addition of a small amount of barium. These ceramics have a spinel structure, and the conduction takes place by a hopping process involving ...
P. Castelan   +4 more
openaire   +2 more sources

Thermopower coefficient of pine-wood biocarbon preforms and the biocarbon-preform/copper composites

open access: closedPhysics of the Solid State, 2010
The thermopower S(T) of the composites prepared by filling empty sap channels in high-porosity biocarbon preforms of white pine wood by melted copper in vacuum and the thermopower S(T) of these preforms have been measured in the temperature range 5–300 K.
A. T. Burkov   +5 more
  +4 more sources

Heat capacity and thermopower coefficient of the carbon preform of sapele wood

open access: closedPhysics of the Solid State, 2009
This paper reports on measurements of the heat capacity at constant pressure Cp in the 80–300-K temperature interval and the thermopower coefficient S at 5–300 K of the carbon preform of sapele wood, which was prepared at the carbonization temperature of 1000°C. Measurements of Cp(T), our previous data on the phonon thermal conductivity, and literature
L. S. Parfen’eva   +8 more
openaire   +2 more sources

Determination of the parameters of the normal state in doped yttrium high-temperature superconductors from thermopower coefficients in terms of different models of electron transport

open access: closedPhysics of the Solid State, 2010
The temperature dependences of the thermopower coefficient for two systems of doped yttrium high-temperature superconductors Y1 − xPrxBa2Cu3Oy (x = 0.1−0.6) and Y1 − xCaxBa1.5La0.5Cu3Oy (x = 0.05–0.30) have been analyzed using three models of electron transport, i.e., the Xin two-band model, the two-band model with an additional term linear in ...
O. S. Komarova, V. É. Gasumyants
openaire   +2 more sources

Determining absolute Seebeck coefficients from relative thermopower measurements of thin films and nanostructures

open access: closedJournal of Applied Physics, 2020
Measurements of thermoelectric effects such as the Seebeck effect, the generation of electric field in response to an applied thermal gradient, are important for a range of thin films and nanostructures used in nanoscale devices subject to heating. In many cases, a clear understanding of the fundamental physics of these devices requires knowledge of ...
S. J. Mason   +4 more
openaire   +2 more sources

Drift-diffusion contributions to the thermopower and Nernst–Ettingshausen coefficient of graphite

open access: closedPhilosophical Magazine B, 1980
Abstract Drift-diffusion contributions to the thermoelectric power and Nernst–Ettingshausen effect have been calculated for graphite, using simplified models for the dispersion relationship ∊(k) and carrier relaxation time τ(∊). A comparison of the results with those derived from experiment on single-crystal and highly oriented pyrolytic graphite ...
Claude Ayache, Ian L. Spain
openaire   +2 more sources

Temperature coefficient of the resistivity and thermopower of pure liquid germanium: a new approach

open access: closedJournal of Physics: Condensed Matter, 1999
We have recently published our experimental results on the resistivity () and on the absolute thermoelectric power (S) of liquid germanium. We complete the first paper by presenting improved theoretical calculations taking into account the generalized gradient approximation (GGA) with more recent exchange and correlation contributions.
M Bestandji   +4 more
openaire   +2 more sources

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