2013年6月
Two-barrier stability that allows low-power operation in current-induced domain-wall motion
NATURE COMMUNICATIONS
- 巻
- 4
- 号
- 開始ページ
- 2011
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/ncomms3011
- 出版者・発行元
- NATURE PUBLISHING GROUP
Energy barriers in magnetization reversal dynamics have long been of interest because the barrier height determines the thermal stability of devices as well as the threshold force triggering their dynamics. Especially in memory and logic applications, there is a dilemma between the thermal stability of bit data and the operation power of devices, because larger energy barriers for higher thermal stability inevitably lead to larger magnetic fields (or currents) for operation. Here we show that this is not the case for current-induced magnetic domain-wall motion induced by adiabatic spin-transfer torque. By quantifying domain-wall depinning energy barriers by magnetic field and current, we find that there exist two different pinning barriers, extrinsic and intrinsic energy barriers, which govern the thermal stability and threshold current, respectively. This unique two-barrier system allows low-power operation with high thermal stability, which is impossible in conventional single-barrier systems.
- リンク情報
- ID情報
-
- DOI : 10.1038/ncomms3011
- ISSN : 2041-1723
- PubMed ID : 23771026
- Web of Science ID : WOS:000323625200008