Can dielectric constant of semiconductor be calculated or estimated?

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Discussion Overview

The discussion centers on estimating the dielectric constant of cobalt oxide, particularly in the absence of comprehensive data. Participants explore various methods for estimation and the challenges associated with obtaining accurate values.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant requests assistance in estimating the dielectric constant of cobalt oxide, noting a lack of available data.
  • Another participant suggests using the Clausius–Mossotti relation as a first approximation and recommends consulting handbooks for experimentally measured values.
  • A participant reports finding a rough value of 12.9 for cobalt oxide's dielectric constant in the CRC handbook, but expresses a desire for more detailed data on the complex dielectric constant across different frequencies.
  • One participant advises searching for scientific journal papers to find more comprehensive information on the dielectric constant.
  • Another participant mentions that for high-accuracy measurements across many frequencies, it may be necessary to hire a laboratory for testing if literature is insufficient.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to obtain accurate dielectric constant values, with multiple competing views on methods and sources of information remaining present.

Contextual Notes

Limitations include the roughness of available data, potential dependencies on frequency ranges, and the need for experimental measurements for high accuracy.

Jovis
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Greetings,

Could anyone help to tell me how to estimate the dielectric constant of cobalt oxide?
Cause I have looked for the database, and couldn't find the data.

Very thanks,
jovis
 
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As a first approximation, you could use the http://en.wikipedia.org/wiki/Clausius%E2%80%93Mossotti_relation" . The best approach typically though is to use experimentally measured values found in handbooks such as the CRC handbook.
 
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Hi chrisbaird,

Thanks a lot for your reply. I just checked the CRC handbook for the dielectric constants of cobalt oxide. But it seems to me it has only a very rough value, 12.9 within the frequency between 10^2-10^10.

http://books.google.com/books?id=q2...&resnum=2&ved=0CCEQ6AEwAQ#v=onepage&q&f=false

I wonder if there is data of complex dielectric constant verse wavelength or frequency.

Thanks a lot,
jovis
 
You will probably need to find a paper in a scientific journal for such comprehensive information.

Claude.
 
You may not like this answer, but: If you need high-accuracy, high-resolution dielectric constant values over many frequencies, and you cannot find it in the scientific literature, you may need to hire a laboratory to take the measurements for you.
 
Thanks a lot for you reply. Claude and Chrisbaird.

Very appreciated...
jovis
 

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