期刊論文
| 學年 | 102 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2014-01-01 |
| 作品名稱 | Disorder-induced Room Temperature Ferromagnetism in Glassy Chromites |
| 作品名稱（其他語言） | |
| 著者 | Moyses Araujo; Sandeep Nagar; Muhammad Ramzan; R. Shukla; O. D. Jayakumar; A. K. Tyagi; Liu, Yi-Sheng; Chen, Jeng-Lung; Per-Anders Glans; Chang, Chinglin 張經霖; Andreas Blomqvist; Raquel Lizárraga; Erik Holmström; Lyubov Belova; Guo, Jinghua; Rajeev Ahuja; K. V. Rao |
| 單位 | 淡江大學物理學系 |
| 出版者 | London: Nature Publishing Group |
| 著錄名稱、卷期、頁數 | Scientific Reports 4, 4686 |
| 摘要 | We report an unusual robust ferromagnetic order above room temperature upon amorphization of perovskite [YCrO3] in pulsed laser deposited thin films. This is contrary to the usual expected formation of a spin glass magnetic state in the resulting disordered structure. To understand the underlying physics of this phenomenon, we combine advanced spectroscopic techniques and first-principles calculations. We find that the observed order-disorder transformation is accompanied by an insulator-metal transition arising from a wide distribution of Cr-O-Cr bond angles and the consequent metallization through free carriers. Similar results also found in YbCrO3-films suggest that the observed phenomenon is more general and should, in principle, apply to a wider range of oxide systems. The ability to tailor ferromagnetic order above room temperature in oxide materials opens up many possibilities for novel technological applications of this counter intuitive effect. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 2045-2322 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | 電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/98488 ) |