✦ LIBER ✦

Investigation of the thermal and electrical transport properties of niobium and niobium films at temperatures between 9 and 50 K

✍ Scribed by K. Reiche; G. Pompe

Book ID: 104628203
Publisher: Springer US
Year: 1979
Tongue: English
Weight: 563 KB
Volume: 36
Category: Article
ISSN: 0022-2291
DOI: 10.1007/bf00118716

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✦ Synopsis

The thermal conductivity and the electrical conductivity of niobium crystals and niobium films have been investigated in the normal state from 9 to 50 K. The deviations from the Matthiessen rule, W = B/T + o~ T 2, have been studied in detail for the thermal case. The investigation shows a slight dependence of the electron-phonon scattering coefficient ~ upon the impurity content of the sample. With the specific electrical residual resistivity po as the measure for the impurity content, the following correlation can be formulated: ~= 1.2x lO-3[po/(l~-cm)] ~176 a being obtained in cm/ W K. Above 20 K an additional scattering mechanism occurs. The temperature dependence of the additional resistance A W between 20 and 50 K is proportional to T 55. 9 9 T 4. Possible causes of this phenomenon are discussed. For the discussion, all the data available in the literature on the thermal conductivity of niobium in this temperature region are used.

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