demonstrate that the DW velocity can be significantly increased in antiferomagnetically coupled nanowires. The DW velocity increase is related to the exchange fields and reduction or elimination of the magnetostatic effects, which lead to reduction or elimination of the Walker breakdown. In addition, the reduction of the magnetostatic effects results in the reduction of the effects due to the pinning sites and disorder present in most nanomagnetic systems. The reduction of the pinning site and disorder effects further leads to a steadier DW motion. The study includes an analytical model for explaining how and why the Walker breakdown is overcome as well as numerical study supporting the analytical model and providing insights into the effects of the material and structural disorder. The numerical study is based on micromagnetic simulations solving the Landau-Lifshitz-Gilbert equation with continuous spin transfer torque components. The parameter space considered in the models and simulations includes the material properties, various types of disorder, and the exchange coupling in coupled systems. In addition, we discuss various aspects associated with modeling the DW motion in thin nanowires with disorder, including simulation speed, numerical stability, and the simulation model creation.
Majd Kuteifan, Sidi Fu, Stephane Mangin, Eric E. Fullerton, and Vitaliy Lomakin, "Domain wall motion in ferromagnetically and antiferromagnetically coupled nanowires
(Conference Presentation)," Proc. SPIE 9931, Spintronics IX, 99312D (Presented at SPIE Nanoscience + Engineering: August 30, 2016; Published: 4 November 2016); https://doi.org/10.1117/12.2240630.5166910698001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 14,000 conference presentations, including many plenary and keynote presentations.
Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon