| Автор | M Kumaresavanji |
| Автор | M S Reis |
| Автор | Y T Xing |
| Автор | M B Fontes |
| Дата выпуска | 2010-01-01 |
| dc.description | The electrical resistance, magnetization and magnetoresistance of La<sub>1.32</sub>Sr<sub>1.68</sub>Mn<sub>2</sub>O<sub>7</sub> layered manganite have been studied under hydrostatic pressure and magnetic field. At ambient pressure, the temperature dependence of the magnetization shows a ferromagnetic to paramagnetic transition at 118 K. Close to this transition, we have also observed a metal-insulator transition at T T<sup>1</sup><sub>MI</sub> in the temperature dependence of the resistivity ρ(T) measurement. The increasing pressure enhances a second metal-insulator transition T<sup>2</sup><sub>MI</sub> at a critical pressure 6 ≤ P<sub>C</sub> ≤ 7 kbar. With further increasing pressure, both the T<sup>1</sup><sub>MI</sub> and T<sup>2</sup><sub>MI</sub> shift to high temperatures and the peak resistivity suppresses abruptly. We could not observe any transition correspond to T<sup>2</sup><sub>MI</sub> in the temperature dependence of the magnetization up to 10.2 kbar. A large negative tunneling magnetoresistance was observed around T<sub>C</sub> in the field dependence of the ρ(T) curves and the pressure reduces magnetoresistance ratio significantly. From our results, we argue that the increasing pressure induces a canted ferromagnetic order which leads to a ferromagnetic insulating phase at low temperature. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | © 2010 IOP Publishing Ltd |
| Название | Pressure induced canted ferromagnetic order in La<sub>1.32</sub>Sr<sub>1.68</sub>Mn<sub>2</sub>O<sub>7</sub> layered manganite |
| Тип | paper |
| DOI | 10.1088/1742-6596/200/5/052013 |
| Electronic ISSN | 1742-6596 |
| Print ISSN | 1742-6588 |
| Журнал | Journal of Physics: Conference Series |
| Том | 200 |
| Первая страница | 52013 |
| Последняя страница | 52018 |
| Выпуск | 5 |
