| Popis: |
(106 x room temperature) at low temperature, the quantity that determines the electron mean free path as the film thickness. However, the electron mean free paths of our films are not as long as those of andlum and tm films, and the situation is different f rom these cases From our data on resistance ratio and our observation of grams in films by an electron microscopy, this seems reasonable Thus, in the case of our lead films, 2o and Tc do not depend on the film thickness, but do depend on the resistance ratm This result is similar to the impurity effect on Tc observed by Serln and others, that is, Tc decreases hnearly according to low impurity concentratlon I f we apply our result of lead films to bulk cases, it wall be possible to predict the change in Te with resistance ratio |
