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Can the program Comsol be used for modeling of ferroelectrics phase transition?

Posted 14.07.2010, 04:11 GMT-4 4 Replies

Alexey Viskovatyh
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4 Replies Last Post 14.07.2010, 12:30 GMT-4
Alexey Viskovatyh
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Posted: 1 decade ago 14.07.2010, 09:17 GMT-4
Who can help how can Comsol be used for modeling of ferroelectrics below Curie point.
Who can help how can Comsol be used for modeling of ferroelectrics below Curie point.
Kai Herbrig
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Posted: 1 decade ago 14.07.2010, 11:05 GMT-4
Using a step function in material properties (temperature depending magnetic permeability)? But, I've never used the ACDC-Module. Is it coupled with heat transfer (-> e.g. T_htgh)?

mu=flc1hs(T_htgh-T_curie,0.5)*mu_ferro
Using a step function in material properties (temperature depending magnetic permeability)? But, I've never used the ACDC-Module. Is it coupled with heat transfer (-> e.g. T_htgh)? mu=flc1hs(T_htgh-T_curie,0.5)*mu_ferro
Alexey Viskovatyh
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Posted: 1 decade ago 14.07.2010, 12:21 GMT-4
I want to obtain the distribution of spontaneous polarization and electrical potantial which appear in ferroelectrics below Curie point. I'm modeling a composition material consisting of dielectric matrix and ferroelectrics grains. The polarization and potential submit partial differential system below Curie point. This partial differential system is non-linear and has following view:

æ•?? + ?•? - ?•?^3 = d?/dz-E0
?•?? = 4?•dP/dz

I want to obtain the distribution of spontaneous polarization and electrical potantial which appear in ferroelectrics below Curie point. I'm modeling a composition material consisting of dielectric matrix and ferroelectrics grains. The polarization and potential submit partial differential system below Curie point. This partial differential system is non-linear and has following view: æ•?? + ?•? - ?•?^3 = d?/dz-E0 ?•?? = 4?•dP/dz
Alexey Viskovatyh
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Posted: 1 decade ago 14.07.2010, 12:30 GMT-4
æ•div(gradP) + a•P - b•P^3 = dFi/dz-E0
epsilon•div(gradFi) = 4pi•dP/dz
æ•div(gradP) + a•P - b•P^3 = dFi/dz-E0 epsilon•div(gradFi) = 4pi•dP/dz

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