DOI:10.5488/CMP.17.43703 arXiv:1502.02399
Title:
Electrocaloric effect in KH2PO4 family crystals
Author(s):
| A.S. Vdovych (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii str, 79011 Lviv, Ukraine) , | |
| A.P. Moina (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii str, 79011 Lviv, Ukraine) , | |
| R.R. Levitskii (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii str, 79011 Lviv, Ukraine) , | |
| I.R. Zachek (Lviv Polytechnic National University, 12 Bandera Str., 79013 Lviv, Ukraine) |
The proton ordering model for the KH2PO4 type ferroelectrics is modified by taking into account the dependence of the effective dipole moments on the proton ordering parameter. Within the four-particle cluster approximation we calculate the crystal polarization and explore the electrocaloric effect. Smearing of the ferroelectric phase transition by a longitudinal electric field is described. A good agreement with experiment is obtained.
Key words:
electrocaloric effect, KDP, cluster approximation, polarization
PACS:
77.84.Fa, 77.70.+a
| Full text [pdf] | << List of papers |