Highly Efficient In-Line Magnetic Domain Wall Injector

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• 作者：Timothy Phung ; Aakash Pushp ; Luc Thomas ; Charles Rettner ; See-Hun Yang ; Kwang-Su Ryu ; John Baglin ; Brian Hughes ; Stuart Parkin
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：February 11, 2015
• 年：2015
• 卷：15
• 期：2
• 页码：835-841
• 全文大小：548K
• ISSN：1530-6992

文摘

We demonstrate a highly efficient and simple scheme for injecting domain walls into magnetic nanowires. The spin transfer torque from nanosecond long, unipolar, current pulses that cross a 90掳 magnetization boundary together with the fringing magnetic fields inherently prevalent at the boundary, allow for the injection of single or a continual stream of domain walls. Remarkably, the currents needed for this 鈥渋n-line鈥?domain wall injection scheme are at least one hundred times smaller than conventional methods.