Magnetothermal Conductivity

The magnetothermal conductivity of UNS N07718 indicates that for temperatures between 5 and 20 K and for magnetic fields below 6366 kA/m, the effect of the field on the conductivity will be 10% or less. There appears to be little reason to expect this percentage to vary greatly for similar alloys. Given this untested assumption, the magnetothermal effect is of the same order as the uncertainty due to material variability (i.e., 10%). The material variability is an uncertainty, while... 

The effects of thermal treatment and trace impurities on magnetothermal conductivity of good conductors cannot be predicted with confidence. The available experimental data indicate the thermal conductivity can vary by at least a factor of 2 due to differences in composition and thermal treatment. A factor-of-2 decrease in thermal conductivity was also observed when a 6366-kA/m field was applied to the copper and aluminum specimens. A possible solution to this problem is to assume that the Lorenz ratio can be used when the electrical and thermal conductivities involved are actually the magnetoresistivity and magnetothermal resistivity, i.e.,... 

According to table 7 A- and B-phase are superpositions of A and E representations with planar and axial symmetry, respectively. They are three-fold degenerate and particular domains with nodes in the kxky ss) (A) or along ky (B) have been chosea This selection might be realised due to internal strains in the SC sample. Polar plots of A, B-phase gap functions are shown in the inset of fig. 65(c). The magnetothermal conductivity in the vortex state of phases A, B in the limit F [Pg.275]

The thermal treatment of the two UNS A91100 specimens shown in Fig. 4 was similar, which indicates that the large observed differences in RRR and conductivity were due to different impurity levels. A factor-of-2 difference is again observed between the zero field thermal conductivities. The magnetothermal data indicate a decrease of 29% at 5 K and 50% at 20 K when the specimen was subjected to a 6366-kA/m field. 

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