Title :
A microscopic model for charge disordered relaxor systems
Author :
Marqués, M.I. ; Aragó, C.
Author_Institution :
Dept. de Fis. de Mater., Univ. Autonoma de Madrid, Madrid, Spain
Abstract :
A microscopic relaxor model is described and its properties are studied by means of numerical simulations. No `a priori´ random interactions neither random fields are considered. The solely interaction of mobile charges with the dipoles of a highly polarizable medium is responsible for the appearance of typical relaxor properties such as a smeared transition, a glassy ground state with no macroscopic polarization, a external field frequency dependent dielectric constant and a field induced ferroelectric behavior.
Keywords :
dielectric polarisation; ferroelectric transitions; ground states; numerical analysis; permittivity; relaxor ferroelectrics; charge disordered relaxor systems; external field frequency dependent dielectric constant; field induced ferroelectric behavior; glassy ground state; highly polarizable medium; macroscopic polarization; microscopic relaxor model; mobile charges; numerical simulations; random fields; random interactions; relaxor properties; Chemicals; Crystals; Dielectric thin films; Ferroelectric materials; Frequency dependence; Lattices; Microscopy; Polarization; Solids; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4970-5
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2009.5307527
