title: Highly efficient in-line magnetic domain wall injector.
abstract: 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.
authors.affiliation: IBM Almaden Research Center , San Jose, California United States.
authors.forename: Timothy
authors.initials: T
authors.lastname: Phung
authors.forename: Aakash
authors.initials: A
authors.lastname: Pushp
authors.forename: Luc
authors.initials: L
authors.lastname: Thomas
authors.forename: Charles
authors.initials: C
authors.lastname: Rettner
authors.forename: See-Hun
authors.initials: SH
authors.lastname: Yang
authors.forename: Kwang-Su
authors.initials: KS
authors.lastname: Ryu
authors.forename: John
authors.initials: J
authors.lastname: Baglin
authors.forename: Brian
authors.initials: B
authors.lastname: Hughes
authors.forename: Stuart
authors.initials: S
authors.lastname: Parkin
keywords: Spintronics; domain wall dynamics; domain wall injection; magnetic nanowires; racetrack memory; spin transfer torque