Effect of iron impurities on the superconductivity in granular technetium
- 1 January 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 19 (1) , 189-192
- https://doi.org/10.1103/physrevb.19.189
Abstract
The effect of Fe impurities on the superconductivity of Tc has been investigated with almost dirty-limit samples prepared by electrodeposition and reduction. Upper-critical-field curves show, as expected from the Mössbauer study, the existence of an exchange field due to the impurity. The observed transition-temperature depression by Fe impurities indicates that there is localized spin fluctuation in the Tc-Fe alloy. This conclusion is not consistent with the previous results found for arc-melted Tc-Fe alloys.Keywords
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