arXiv subjects

A. P. Espejo

Publications and source records attributed to A. P. Espejo.

2 recordsLinked to original sources

arXiv2018

New magnetic states in nanorings created by anisotropy gradients

Magnetic nanorings have been widely studied due to their potential applications in spintronic and magnonic devices. In this work, by means of analytical calculations and micromagnetic simulations we have analyzed the magnetic energy of nanorings with variable anisotropy along their radius. Four magnetic states, including two new magnetic configurations, here called meron and knot-like states, are considered, looking to the relative lower energy states as a function of anisotropy. Phase diagrams with this states are presented.

cond-mat.mes-hall↗

arXiv2017

Oscillatory behavior of the domain wall dynamics in a curved cylindrical magnetic nanowire

Understanding the domain wall dynamics is an important issue in modern magnetism. Here we present results of domain wall displacement in curved cylindrical nanowires at a constant magnetic field. We show that the average velocity of a transverse domain wall increases with curvature. Contrary to what it is observed in stripes, in a curved wire the transverse domain wall oscillates along and rotates around the nanowire with the same frequency. These results open the possibility of new oscillation-based applications.

cond-mat.mes-hall↗