Looking for a book on the causes of permittivity

[toreil]

I'm currently working with some materials that have a high permittivity in order to improve image quality of MRI scanners but finding it hard to find a good book that explains the various effects that contribute to a material's permittivity/dielectric constant. Can anybody point me in a good direction?

 

[SredniVashtar]

Almost any book on electromagnetism and or solid state physics give an account on the origin of permittivity.
Here's one title that comes to mind: Optical Properties of Solids, Mark Fox, but its scope might be too general for your purposes.

Perhaps you should look more in the "Material Science" section of your library?