Are permittivity and permeability quantities that can be predicted?

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SUMMARY

The discussion confirms that both permittivity and permeability can be predicted based on atomic composition, utilizing ab initio calculations. The dielectric function, which varies with frequency and wavenumber, plays a crucial role in determining these properties. While permittivity can be calculated more straightforwardly, permeability is influenced by additional factors such as domain and crystal size, making it more complex. The addition of silicon, for instance, can enhance permeability despite its non-ferromagnetic nature.

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  • Understanding of ab initio calculations in material science
  • Familiarity with dielectric functions and their dependence on frequency and wavenumber
  • Knowledge of crystal structure and domain size effects on material properties
  • Basic concepts of ferromagnetism and its relation to permeability
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  • Research ab initio methods for calculating permittivity and permeability
  • Explore the role of dielectric functions in material characterization
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Material scientists, physicists, and engineers focused on predicting and optimizing the electromagnetic properties of substances.

DuckAmuck
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TL;DR
Can these be derived from other chemical properties?
For example, can you predict the permittivity and permeability of a substance if you know what the atomic composition is? Is it a stat mech problem?
 
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DrDu said:
Yes, it is possible to calculate the permittivity of a substance ab initio.
The theory is not elementary:
http://susi.theochem.tuwien.ac.at/events/ws2015/rolask_optic.pdf
In principle, the dielectric function in dependence of frequency and wavenumber also determines the permeability.
Amazing. Thank you.
 
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Permeability, however, is more of a dark art. It's related to domain size, which is related to crystal size, which isn't just a matter of composition, it's a matter of process. For example, adding silicon usually increases permeability but it isn't even ferromagnetic.
 
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