- #1
athosanian
- 67
- 8
hello, I am learning electromagnetism and read the polarization in dielectric. The textbook tell me that in linear dielectric exists a simple relation:
P=[itex]\chi[/itex]*ε0*E
where [itex]\chi[/itex] is the susceptibility, ε0 is the permittivity of vacuum and E is total electric field in the dielectric. It is noted that E is the total field, namely, applied external field E_0 plus depolarization field E_d in the media.
But when I search this topic on the wiki, I find it says polarization is proportional to the applied external field (link below). So I have a confuse about meaning of E, which is right? I hope any help. Thanks.
http://en.wikipedia.org/wiki/Ferroelectricity
P=[itex]\chi[/itex]*ε0*E
where [itex]\chi[/itex] is the susceptibility, ε0 is the permittivity of vacuum and E is total electric field in the dielectric. It is noted that E is the total field, namely, applied external field E_0 plus depolarization field E_d in the media.
But when I search this topic on the wiki, I find it says polarization is proportional to the applied external field (link below). So I have a confuse about meaning of E, which is right? I hope any help. Thanks.
http://en.wikipedia.org/wiki/Ferroelectricity