THE EFFECT OF PRESSURE ON THE ELECTRICAL RESISTANCE OF LITHIUM

1963 ◽  
Vol 41 (8) ◽  
pp. 1381-1384 ◽  
Author(s):  
D. Gugan
Keyword(s):  
Hydrostatic Pressure ◽  
Electrical Resistance ◽  
Low Temperatures ◽  
Pressure Coefficient ◽  
Residual Resistivity ◽  
Effect Of Pressure ◽  
Dilute Alloys

The change of resistance of lithium with hydrostatic pressure has been studied at low temperatures. Anomalous results have been found at all temperatures. The pressure coefficient of residual resistivity of dilute alloys of magnesium in lithium has been found to depend on the structure of the parent lattice.

The effect of pressure on the electrical resistance of copper at low temperatures

1957 ◽  
Vol 241 (1226) ◽  
pp. 397-407 ◽  
Keyword(s):  
Pure Copper ◽  
Pressure Coefficient ◽  
Residual Resistivity ◽  
Effect Of Pressure ◽  
Commercially Pure ◽  
Large Pressure ◽  
Resistance Minimum ◽  
Commercially Pure Copper ◽  
Good Agreement ◽  
The Ideal

The resistivity of copper under hydrostatic pressures up to 3000 atm has been measured at temperatures between 4° K and room temperature. Two specimens of commercially pure copper (99⋅98%) and an alloy of 0⋅056 at. % iron in copper were studied, the alloy being chosen because it showed a large resistance minimum. The effect of pressure on the ideal resistivity is in good agreement with Grüneisen’s theory. There were some theoretical reasons for expecting that the alloy would have a large pressure coefficient of resistivity at or below the temperature of the resistance minimum. The pressure coefficient at these temperatures was, however, quite small and similar in value to the pressure coefficients of residual resistivity of the two purer specimens. Both the residual resistivity of the alloy and its pressure coefficient appeared to be strongly dependent on temperature.

THE EFFECT OF PRESSURE ON THE ELECTRICAL RESISTANCE OF RUBIDIUM

1957 ◽  
Vol 35 (6) ◽  
pp. 720-729 ◽  
Author(s):  
J. S. Dugdale ◽  
J. A. Hulbert
Keyword(s):  
Low Temperature ◽  
Electrical Resistance ◽  
Room Temperature ◽  
Residual Resistivity ◽  
Effect Of Pressure ◽  
Temperature Range ◽  
Fluid State

By using helium in both the solid and the fluid state as a pressure-transmitting medium, it has been possible to measure the resistance of rubidium over the temperature range from 2° K. to room temperature at pressures up to 2500 atmospheres. In particular the effect of pressure on the transition at ~200° K., on the low temperature ideal resistivity, and on the residual resistivity was examined.

The electrical resistance of some dilute alloys of the noble metals and Re at low temperatures

Physica ◽  
1964 ◽  
Vol 30 (6) ◽  
pp. 1124-1130 ◽  
Author(s):  
B. Knook ◽  
W.M. Star ◽  
H.J.M. Van Rongen ◽  
G.J. Van den Berg
Keyword(s):  
Electrical Resistance ◽  
Low Temperatures ◽  
Noble Metals ◽  
Dilute Alloys

The specific heat of pure copper and of some dilute copper + iron alloys showing a minimum in the electrical resistance at low temperatures

1961 ◽  
Vol 263 (1315) ◽  
pp. 494-507 ◽  
Keyword(s):  
Specific Heat ◽  
Electrical Resistance ◽  
Low Temperatures ◽  
Pure Copper ◽  
Iron Alloys ◽  
Absolute Zero ◽  
Iron Ions ◽  
Temperature Range ◽  
Dilute Alloys ◽  
Resistance Minimum

The specific heat of pure copper and of some dilute alloys of iron in copper, containing approximately 0.05, 0.1 and 0.2at. % iron, have been measured in the temperature range 0.4 to 30 °K. The electrical resistance of the copper + iron alloys has been measured from 0.4 to 80 °K. The alloys show specific-heat anomalies which probably extend from the absolute zero of temperature to the region of the minimum in electrical resistance. The entropy contents of the anomalies lie close to the value R In 2 per mole of iron suggesting that only two energy states of the iron ions are involved in the resistance minimum phenomena. The results are discussed in relation to existing theories.

THE EFFECT OF PRESSURE ON THE REDUCTION OF PORE VOLUME OF CONSOLIDATED SANDSTONES

Geophysics ◽  
1953 ◽  
Vol 18 (2) ◽  
pp. 298-309 ◽  
Author(s):  
D. S. Hughes ◽  
C. E. Cooke
Keyword(s):  
Hydrostatic Pressure ◽  
Pore Volume ◽  
Room Temperature ◽  
Pressure Coefficient ◽  
Berea Sandstone ◽  
Total Change ◽  
Effect Of Pressure ◽  
Percent Change ◽  
Pressure Changes

The changes in pore volume of jacketed dry sandstone samples have been measured under hydrostatic pressures over the range 50 to 1,000 bars (14,504 psi). The percent change in pore volume at each pressure and the pressure coefficient of change of pore volume have been computed. All measurements were made at room temperature. The total change in pore volume when the hydrostatic pressure was increased from 50 to 1,000 bars was found to be about 7.5 percent of the pore volume for a sample of Steven sandstone (porosity 18.5 percent) and approximately 3.0 percent of the pore volume for a sample of Berea sandstone (porosity 19.4 percent). The coefficient of change of pore volume with pressure is found to decrease rather rapidly with increasing pressure up to around 500 bars. Thus pressure changes applied to rock become much more important when the original geostatic load on the rock is small.

TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES

2014 ◽  
Vol 5 (3) ◽  
pp. 982-992 ◽  
Author(s):  
M AL-Jalali
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Low Temperatures ◽  
Noble Metals ◽  
Phonon Scattering ◽  
Theoretical Models ◽  
Residual Resistivity ◽  
Electron Phonon Scattering

Resistivity temperature – dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron – dislocation and impurity, electron-electron, and electron-phonon scattering were analyzed, contribution of these mechanisms to resistivity were discussed, taking into consideration existing theoretical models and available experimental data, where some new results and ideas were investigated.

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