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Author Hernandez,A.; Ares,O.; Hart, C.; Domínguez,D.; Pastoriza,H.; Butera, A. openurl 
  Title Dissipation in mesoscopic superconductors with ac magnetic fields Type Journal Article
  Year 2004 Publication Journal of Low Temperature Physics Abbreviated Journal  
  Volume 135 Issue Pages 119-122  
  Abstract The response of mesoscopic superconductors to an ac magnetic field is investigated both experimentally

and with numerical simulations. We study small square samples with dimensions of the order of the penetration depth.

We obtain the ac susceptibitity $\chi=\chi'+\chi“$ at microwave frequencies as a function of the dc magnetic field

$H{dc}$. We find that the dissipation, given by $\chi”$, has a non monotonous behavior in mesoscopic samples.

In the numerical simulations we obtain that the dissipation increases before the penetration of vortices and

then it decreases abruptly after vortices have entered, the sample. This is verified experimentally, where we

find that $\chi"$ has strong oscillations as a function of $H
{dc}$ in small squares of Pb
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  Notes Approved no  
  Call Number BT @ hernan @ hernandez04 Serial 24  
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