Detail publikace

Noise in Piezoceramics

Originální název

Noise in Piezoceramics

Anglický název

Noise in Piezoceramics

Jazyk

en

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.

Anglický 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.

BibTex


@inproceedings{BUT27835,
  author="Jiří {Majzner} and Petr {Sedlák} and Marian {Štrunc} and Josef {Šikula}",
  title="Noise in Piezoceramics",
  annote="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.",
  address="american institute of physics",
  booktitle="Noise and Fluctuation",
  chapter="27835",
  edition="1",
  institution="american institute of physics",
  year="2007",
  month="january",
  pages="347--350",
  publisher="american institute of physics",
  type="conference paper"
}