期刊論文
| 學年 | 113 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2024-08-23 |
| 作品名稱 | Peculiar spin glass phase emerging in FeCo/FePt driven via nanoconfined crystallographic distortions |
| 作品名稱（其他語言） | |
| 著者 | Garima Vashisht; Ashish C Gandhi; Vishnu Kumar; Arun Jacob Mathew; Chung-Li Dong; Chi-Liang Chen; K Asokan; Sheng Yun Wu; Y Fukuma; S Annapoorni |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Journal of Physics D: Applied Physics 57(46), 465304 |
| 摘要 | We explore the existence of spin glass phase in FeCo/FePt bilayers arising due to disordered ferromagnet. The non-ergodic and highly degenerate landscape of the spin glass phase at low temperature explains the origin of complex magnetic texture in the FeCo/FePt system. Upon cooling the bilayered system, the magnetic texture undergoes spin freezing below 120 K as evident from the bifurcations in zero field cooling and field cooling magnetizations at low magnetic field as a manifestation of broken ergodicity. The uncompensated magnetic moments originating in the spin glass state result in slow time dynamics of thermoremanent magnetization. Consequently, the bilayers demonstrate an intriguing magnetic memory effect in which the magnetic state of the system could be retrieved upon isothermal ageing below 120 K after reversing the temperature cycle. Thermal treatment deteriorates the spin glass behaviour and shows a transition to strong ferromagnetic character in FeCo/FePt bilayers. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0022-3727; 1361-6463 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127621 ) |