Thermal conductivity and electrical resistivity of copper in intense magnetic fields at low temperatures

1982 ◽  
Vol 26 (6) ◽  
pp. 2727-2732 ◽  
Author(s):  
R. W. Arenz ◽  
C. F. Clark ◽  
W. N. Lawless
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Magnetic Fields ◽  
Low Temperatures

Thermal conductivity and electrical resistivity of NbTi alloys at low temperatures

Cryogenics ◽  
1981 ◽  
Vol 21 (12) ◽  
pp. 741-745 ◽  
Author(s):  
Yu.F. Bychkov ◽  
R. Herzog ◽  
I.S. Khukhareva
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Low Temperatures ◽  
Ti Alloys

Thermal and Electrical Conductivities of Sodium from 40 to 360 K

1972 ◽  
Vol 50 (12) ◽  
pp. 1386-1401 ◽  
Author(s):  
J. G. Cook ◽  
M. P. Van der Meer ◽  
M. J. Laubitz
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Low Temperatures ◽  
Characteristic Temperature ◽  
Published Data ◽  
Inelastic Electron ◽  
Conductivity Data ◽  
Electron Collisions ◽  
Electrical Conductivities ◽  
Flow Apparatus

We present data on the electrical and thermal resistivities and the thermopower of three pure Na specimens from 40 to 360 K. The measurements were made using a guarded longitudinal heat flow apparatus that had previously been calibrated with Au and Al. The specimens were placed in a vacuum environment using no solid inert liner.The electrical resistivity data indicate ΘR = 194 K. The thermal conductivity data show a 4% minimum near 70 K and an ice point value of 1.420 W/cm K. The reduced Lorenz function L/L0 agrees with published data at low temperatures but above 300 K levels off at approximately 0.91. On the basis of published data for liquid Na, L/L0 does not change by more than 3% at the melting point.The minimum in the thermal conductivity and a part of the high temperature deviations of L from L0 are tentatively ascribed to inelastic electron–phonon collisions having a characteristic temperature near that of longitudinal phonons. The possibility that electron–electron collisions further depress L at high temperatures is critically examined.

scholarly journals On the electrical resistivity of electrolytic bismuth at low temperature, and in magnetic fields

1897 ◽  
Vol 60 (359-367) ◽  
pp. 425-432 ◽  
Keyword(s):  
Electrical Resistivity ◽  
Low Temperature ◽  
Magnetic Fields ◽  
Electrical Resistance ◽  
Low Temperatures ◽  
Royal Society ◽  
Pole Piece ◽  
Interpolar Distance ◽  
Pure Bismuth ◽  
Transverse Magnetisation

In a previous communication to the Royal Society we have pointed out the behaviour of electrolytically prepared bismuth when cooled to very low temperatures, and at the same time subjected to transverse magnetisation. During the last summer we have extended these observations, and completed them, as far as possible, by making measurements of the electrical resistance of a wire of pure bismuth, placed transversely to the direction of the field of an electromagnet, and at the same time subjected to the low temperature obtained by the use of liquid air. Sir David Salomons was so kind as to lend us for some time his large electromagnet, which, in addition to giving a powerful field, is provided with the means of easily altering the interpolar distance of the pole pieces, and also for changing from one form of pole piece to another.

Electrical Resistivity, Thermal Conductivity and Magnetic Susceptibility of Polycrystalline Samarium at Low Temperatures

1966 ◽  
Vol 21 (11) ◽  
pp. 1856-1859 ◽  
Author(s):  
Sigurds Arajs ◽  
G. R. Dunmyre
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Magnetic Moment ◽  
Low Temperatures ◽  
Fair Agreement ◽  
Magnetic Transformation ◽  
Electronic Thermal Conductivity ◽  
Theoretical Considerations

Electrical resistivity, thermal conductivity, and magnetic susceptibility have been measured, using the same sample of samarium, from 4 to 300 °K, from 5 to 200 °K, and from 4 to 300 °K, respectively. Two anomalies, one at 12 ± 1 °K and another at 106 ± 1 °K, are observed, resulting from an order-order magnetic transformation and an antiferromagnetic-paramagnetic transition, respectively. The Lorenz function is found to be larger at any temperature than that expected for pure electronic thermal conductivity. This implies that there is some phonon and possibly also some magnon thermal conductivity in samarium at low temperatures. The magnetic moment disorder electrical resistivity of samarium is determined to be 39.0 ± 0.5 μΩ cm, in fair agreement with the value to be expected from theoretical considerations.

On the Boundedness of the Dimensionless Index of Performance of a Nernst Effect Generator

1963 ◽  
Vol 30 (2) ◽  
pp. 291-294
Author(s):  
S. W. Angrist
Keyword(s):  
Magnetic Field ◽  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Magnetic Fields ◽  
Dimensionless Quantity ◽  
Nernst Effect ◽  
Strong Magnetic Fields ◽  
Weak Magnetic Fields ◽  
Effect Generator

The author, in an earlier paper, analyzed a Nernst effect generator by the usual thermodynamic methods and found that a bound of unity arises on the dimensionless quantity θT where θ is given as the square of the product of the Nernst coefficient and magnetic field divided by the thermal conductivity and electrical resistivity. By application of the appropriate equations of semiconductor theory this bound is shown to be justified for four limiting cases: Weak magnetic fields considering both extrinsic and intrinsic materials, and strong magnetic fields considering both extrinsic and intrinsic materials.

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