| Issue |
Europhys. Lett.
Volume 58, Number 3, May 2002
|
|
|---|---|---|
| Page(s) | 422 - 428 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00656-8 | |
| Published online | 01 August 2002 | |
Characteristic features of the temperature dependence
of the surface impedance in polycrystalline 
samples
1
Institute of Solid State Physics - 142432
Chernogolovka, Moscow district, Russia
2
INFM, Unità di Palermo and Dipartimento
di Scienze Fisiche e Astronomiche Via Archirafi 36,
I-90123 Palermo, Italy
Received:
13
November
2001
Accepted:
4
February
2002
The real 
and imaginary 
parts of
the surface impedance 
in polycrystalline samples of different density with
the critical temperature 
are measured
at the frequency of 9.4
and in the temperature range 
. The normal skin-effect condition
at 
holds only for
the samples of the highest density with roughness sizes not more
than 0.1
. For such samples extrapolation 
of the linear at 
temperature dependences
and
results in values of the London penetration depth
and residual surface
resistance 
. In the entire
temperature range the dependences and
are well described by the modified two-fluid model.
PACS: 74.25.Nf – Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) / 74.70.Ad – Metals; alloys and binary compounds (including A15, Laves phases, etc.)
© EDP Sciences, 2002
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