Параметры публикации

Тип публикации: 

Статья в журнале/сборнике


Impact of surface strain on the spin dynamics of deposited Co nanowires



Наименование источника: 

  • Journal of Applied Physics

Обозначение и номер тома: 



  • Melville, New York


  • AIP Publishing

Год издания: 



Tailoring the magnetic properties at atomic-scale is essential in the engineering of modern spintronics devices. One of the main concerns in the novel nanostructured materials design is the decrease of the paid energy in the way of functioning, but allowing to switch between different magnetic states with a relative low-cost energy at the same time. Magnetic anisotropy (MA) energy defines the stability of a spin in the preferred direction and is a fundamental variable in magnetization switching processes. Transition-metal wires are known to develop large, stable spin and orbital magnetic moments together with MA energies that are orders of magnitude larger than in the corresponding solids. Different ways of controlling the MA have been exploited such as alloying, surface charging, and external electrical fields. Here we investigate from a first-principle approach together with dynamic calculations, the surface strain driven mechanism to tune the magnetic properties of deposited nanowires. We consider as a prototype system, the monoatomic Co wires deposited on strained Pt(111) and Au(111) surfaces. Our first-principles calculations reveal a monotonic increase/decrease of MA energy under compressive/tensile strain in supported Co wire. Moreover, the spin dynamics studies based on solving the Landau-Lifshitz-Gilbert equation show that the induced surface-strain leads to a substantial decrease of the required external magnetic field magnitude for magnetization switching in Co wire.

Библиографическая ссылка: 

Поляков О.П., Коробова Ю.Г., Степанюк О.В., Бажанов Д.И. Impact of surface strain on the spin dynamics of deposited Co nanowires // Journal of Applied Physics. 2017. Vol.121. С. 0143061-0143069.