| Автор | Y L Chang |
| Автор | C K Ong |
| Дата выпуска | 2004-06-02 |
| dc.description | The microstructure, magnetic and electrical transport properties of La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/Nd<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> composites are studied as a function of sintering temperature. At 900 °C, the intergrain exchange couplings between the adjacent particles give rise to an increase in resistance. Raising the sintering temperature induces the formation of an interfacial phase near the La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> and Nd<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> grain boundaries as indicated in the XRD pattern and SEM image. At 1100 °C, the formation of interfacial phases near the grain boundaries enhances the conductivity in the composite. Broad magnetoresistance across room temperature is observed in a composite sintered at 1300 °C. This observation may be ascribed to the coexistence of multiphase in the composite which leads to a decrease in resistance. The results suggest that sintering temperature has a prominent effect on the properties of the grain boundary, which plays an important role in determining the electrical transport behaviour of the composites. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | IOP Publishing Ltd |
| Название | Temperature sintering effects on the magnetic, electrical and transport properties of La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/Nd<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> composites |
| Тип | paper |
| DOI | 10.1088/0953-8984/16/21/019 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 16 |
| Первая страница | 3711 |
| Последняя страница | 3718 |
| Аффилиация | Y L Chang; Department of Physics, National University of Singapore, 10 Kent Ridge Cresent, 119260, Singapore |
| Аффилиация | C K Ong; Department of Physics, National University of Singapore, 10 Kent Ridge Cresent, 119260, Singapore |
| Выпуск | 21 |
