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Highly Efficient In-Line Magnetic Domain Wall Injector

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posted on 11.02.2015, 00:00 by Timothy Phung, Aakash Pushp, Luc Thomas, Charles Rettner, See-Hun Yang, Kwang-Su Ryu, John Baglin, Brian Hughes, Stuart Parkin
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° 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 “in-line” domain wall injection scheme are at least one hundred times smaller than conventional methods.