TY - JOUR

T1 - Interaction between magnetic vortex cores in a pair of nonidentical nanodisks

AU - Sinnecker, J. P.

AU - Vigo-Cotrina, H.

AU - Garcia, F.

AU - Novais, E. R.P.

AU - Guimarães, A. P.

PY - 2014/5/28

Y1 - 2014/5/28

N2 - The coupling of two nonidentical magnetic nanodisks, i.e., with different vortex gyrotropic frequencies, is studied. From the analytical approach, the interactions between the nanodisks along x and y directions (the coupling integrals) were obtained as a function of distance. From the numerical solution of Thiele's equation, we derived the eigenfrequencies of the vortex cores as a function of distance. The motion of the two vortex cores and, consequently, the time dependence of the total magnetization M(t) were derived both using Thiele's equation and by micromagnetic simulation. From M(t), a recently developed method, the magnetic vortex echoes, analogous to the Nuclear Magnetic Resonance spin echoes, was used to compute the distance dependence of the magnetic coupling strength. The results of the two approaches differ by approximately 10%; using one single term, a dependence with distance found is broadly in agreement with studies employing other techniques.

AB - The coupling of two nonidentical magnetic nanodisks, i.e., with different vortex gyrotropic frequencies, is studied. From the analytical approach, the interactions between the nanodisks along x and y directions (the coupling integrals) were obtained as a function of distance. From the numerical solution of Thiele's equation, we derived the eigenfrequencies of the vortex cores as a function of distance. The motion of the two vortex cores and, consequently, the time dependence of the total magnetization M(t) were derived both using Thiele's equation and by micromagnetic simulation. From M(t), a recently developed method, the magnetic vortex echoes, analogous to the Nuclear Magnetic Resonance spin echoes, was used to compute the distance dependence of the magnetic coupling strength. The results of the two approaches differ by approximately 10%; using one single term, a dependence with distance found is broadly in agreement with studies employing other techniques.

UR - http://www.scopus.com/inward/record.url?scp=84901992458&partnerID=8YFLogxK

U2 - 10.1063/1.4878875

DO - 10.1063/1.4878875

M3 - Artículo

AN - SCOPUS:84901992458

SN - 0021-8979

VL - 115

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 20

M1 - 203902

ER -