| Автор | W L Zhong |
| Автор | B Jiang |
| Автор | P L Zhang |
| Автор | J M Ma |
| Автор | H M Cheng |
| Автор | Z H Yang |
| Дата выпуска | 1993-04-19 |
| dc.description | The size effect on the ferroelectric phase transition in PbTiO<sub>3</sub> ultra-fine particles is reported. Samples with particle sizes from 20 to 200 nm were prepared by a sol-gel process followed by calcining at different temperatures. The particle size was determined by X-ray diffraction from the integrated width of diffractions. The soft-mode frequency at room temperature was measured by Raman scattering. It decreases with decreasing particle size. The ferroelectric phase transition was traced by specific-heat measurement. The transition temperature decreases and the transition becomes diffused as the particle size decreases. The size dependence of T<sub>C</sub> can be described by T<sub>C</sub>(D)=766-256/(D-8.8) (K), where 766 K is the T<sub>C</sub> for bulk PbTiO<sub>3</sub> and D (nm) is the particle size. This equation gives a critical size of 9.1 nm below which ferroelectricity disappears. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Phase transition in PbTiO<sub>3</sub> ultrafine particles of different sizes |
| Тип | paper |
| DOI | 10.1088/0953-8984/5/16/018 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 5 |
| Первая страница | 2619 |
| Последняя страница | 2624 |
| Аффилиация | W L Zhong; Dept. of Phys., Shandong Univ., Jinan, China |
| Аффилиация | B Jiang; Dept. of Phys., Shandong Univ., Jinan, China |
| Аффилиация | P L Zhang; Dept. of Phys., Shandong Univ., Jinan, China |
| Аффилиация | J M Ma; Dept. of Phys., Shandong Univ., Jinan, China |
| Аффилиация | H M Cheng; Dept. of Phys., Shandong Univ., Jinan, China |
| Аффилиация | Z H Yang; Dept. of Phys., Shandong Univ., Jinan, China |
| Выпуск | 16 |
