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MAJZNER, J. SEDLÁK, P. ŠTRUNC, M. ŠIKULA, J.
Originální název
Noise in Piezoceramics
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
Thermal noise and polarisation noise are the main sources of voltage or current fluctuations in piezoceramic samples which are used as acoustic emission sensors. Signal to noise ratio plays important role. Noise is related to energy dissipation and due to that conductivity is proportional to imaginary part of susceptibility and to the frequency. The measured noise spectral density is 1/f type, but it is not related to the mobility fluctuations in this case, because no DC current or voltage was applied on the sample. Physical quantity SU/RS shows that in all frequency range SU/RS is a constant in the first approximation and it is very near to 4kT. There is no source of 1/f fluctuations caused by mobility fluctuations.
Klíčová slova
piezoelectric ceramics, noise
Autoři
MAJZNER, J.; SEDLÁK, P.; ŠTRUNC, M.; ŠIKULA, J.
Rok RIV
2007
Vydáno
1. 1. 2007
Nakladatel
american institute of physics
Místo
USA
ISBN
978-0-7354-0432-8
Kniha
Noise and Fluctuation
Edice
1
Číslo edice
Strany od
347
Strany do
350
Strany počet
4
BibTex
@inproceedings{BUT27835, author="Jiří {Majzner} and Petr {Sedlák} and Marian {Štrunc} and Josef {Šikula}", title="Noise in Piezoceramics", booktitle="Noise and Fluctuation", year="2007", series="1", number="1", pages="347--350", publisher="american institute of physics", address="USA", isbn="978-0-7354-0432-8" }