TY - JOUR
T1 - Parallels between a system of coupled magnetic vortices and a ferromagnetic/nonmagnetic (FM/NM) multilayer system
AU - Vigo-Cotrina, H.
AU - Guimarães, A. P.
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - The coupling of interacting magnetic nanodisks with vortex configuration has interesting consequences, and has possible applications in the transport and processing of information. We show, through micromagnetic simulation and the use of Thiele's equation, that the coupling of magnetic vortices and the phenomenon of spin pumping in FM/NM multilayers, although arising from different physical mechanisms, show significant parallels. We study the variation of the effective damping (αeff) of the system formed by a string of nanodisks with magnetic vortex structure, and Gilbert damping constant α1, interacting with another disk with Gilbert constant α2 (α2⩾α1). The result of varying the number of disks in the string is analogous to the observed variation of effective damping as a function of FM layer thickness, in FM/NM multilayers. The variation of the value of α2 is analogous to the ability of the NM layer to act as a spin sink, for different NM materials. We also obtain that the effective damping goes through a maximum as a function of the value of damping α2; an analogous effect is present in experiments with FM/NM systems, when the thickness of the NM layer is varied.
AB - The coupling of interacting magnetic nanodisks with vortex configuration has interesting consequences, and has possible applications in the transport and processing of information. We show, through micromagnetic simulation and the use of Thiele's equation, that the coupling of magnetic vortices and the phenomenon of spin pumping in FM/NM multilayers, although arising from different physical mechanisms, show significant parallels. We study the variation of the effective damping (αeff) of the system formed by a string of nanodisks with magnetic vortex structure, and Gilbert damping constant α1, interacting with another disk with Gilbert constant α2 (α2⩾α1). The result of varying the number of disks in the string is analogous to the observed variation of effective damping as a function of FM layer thickness, in FM/NM multilayers. The variation of the value of α2 is analogous to the ability of the NM layer to act as a spin sink, for different NM materials. We also obtain that the effective damping goes through a maximum as a function of the value of damping α2; an analogous effect is present in experiments with FM/NM systems, when the thickness of the NM layer is varied.
KW - Magnetic vortex
KW - Micromagnetic simulation
KW - Spin pumping
KW - Thiele's equation
UR - http://www.scopus.com/inward/record.url?scp=85073933112&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2019.166009
DO - 10.1016/j.jmmm.2019.166009
M3 - Artículo
AN - SCOPUS:85073933112
SN - 0304-8853
VL - 497
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 166009
ER -