Structure factor of a relaxor ferroelectric
We study a minimal model for a relaxor ferroelectric including dipolar interactions, and short-range harmonic and anharmonic forces for the critical modes as in the theory of pure ferroelectrics together with quenched disorder coupled linearly to the critical modes. We present the simplest approxima...
| Autores: | , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2015 |
| País: | Costa Rica |
| Recursos: | Universidad de Costa Rica |
| Repositório: | Kérwá |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/27866 |
| Acesso em linha: | http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.144105 https://hdl.handle.net/10669/27866 |
| Access Level: | Acceso aberto |
| Palavra-chave: | relaxor ferroelectrics |
| Resumo: | We study a minimal model for a relaxor ferroelectric including dipolar interactions, and short-range harmonic and anharmonic forces for the critical modes as in the theory of pure ferroelectrics together with quenched disorder coupled linearly to the critical modes. We present the simplest approximate solution of the model necessary to obtain the principal features of the correlation functions. Specifically, we calculate and compare the structure factor measured by neutron scattering in different characteristic regimes of temperature in the relaxor PbMg1/3Nb2/3O3. |
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