|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >
Suppression of metal-insulator transition at high pressure and pressure-induced magnetic ordering in pyrochlore oxide Nd2Ir2O7
| Title: | Suppression of metal-insulator transition at high pressure and pressure-induced magnetic ordering in pyrochlore oxide Nd2Ir2O7 |
| Authors: | Sakata, Masafumi Browse this author | | Kagayama, Tomoko Browse this author | | Shimizu, Katsuya Browse this author | | Matsuhira, Kazuyuki Browse this author | | Takagi, Seishi Browse this author | | Wakeshima, Makoto Browse this author | | Hinatsu, Yukio Browse this author |
| Issue Date: | 1-Jan-2011 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 83 |
| Issue: | 4 |
| Start Page: | 041102 |
| Publisher DOI: | 10.1103/PhysRevB.83.041102 |
| Abstract: | We report the pressure dependence of electrical resistance R(T) of a frustrated pyrochlore oxide Nd2Ir2O7, which shows a second-order metal-insulator transition (MIT) at 36 K. This MIT is monotonically suppressed by the application of pressure. The insulating phase disappears at around 10 GPa. Then, in the pressure-induced metallic state above 10 GPa, a new pressure-induced phase transition emerges at around 3 K, which is characterized by a resistance drop. The new phase transition is due to a ferromagnetic (FM) ordering, which is suggested to be an ordered spin ice (two-in two-out) state of the Nd moment via the RKKY interaction. We succeeded in observing the phase competition between the MIT and the FM ordering by the application of high pressure. |
| Rights: | ©2011 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/44975 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 日夏 幸雄
|
