2011 Fiscal Year Final Research Report
Development of large STT microwave oscillation magnet with coherent phase-locking
| Project/Area Number |
21246049
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Electronic materials/Electric materials
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
SAHASHI Masashi 東北大学, 大学院・工学研究科, 教授 (20361123)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
DOI Masaaki 東北学院大学, 工学部・電子工学科, 教授 (10237167)
MIYAKE Kousaku 東北大学, 大学院・工学研究科, 助教 (20374960)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Keywords | 電気・電子材料(半導体、誘電体、磁性体、超誘電体、有機物、絶縁体、超伝導体など) / マイクロ波発振磁性体 |
|---|
| Research Abstract |
We have succeeded in obtaining good oscillation power in terms of magnetoresistance ratio with the confined domain wall type magnetoresistive devices, where ~ 1μW(Q=200)and 0. 2μW(Q=600)were confirmed in vortex structure and near anti-parallel state, respectively. These high level oscillations could be explained by Auto-Oscillation model, which means that larger power oscillation with higher Q-value is realized by decreasing threshold current to auto-oscillation mode. In addition, the high sensitivity of 1. 5V/W in STT-FMR measurement was obtained in the confined domain wall MR devices. So, good transmitter/receiver performance of the miniaturized confined domain wall MR devices was verified in this study, leading to realization of wireless chip to chip communication (wireless 3D packaging).
|
