Collective spin waves in high-density two-dimensional arrays of FeCo nanowires.
Brillouin measurements have been made of the spin dynamics of high-density two-dimensional hexagonally ordered 20 nm diameter Fe48Co52 nanowire arrays, with various interwire spacings, as a function of longitudinal magnetic field. The experimental data are analyzed within the Arias-Mills theory based on interwire dipolar couplings in the arrays. The results provide conclusive evidence of collective spin waves arising from the dipolar coupling which is manifested as a reduction in spin wave frequency with decreasing interwire spacing.
Wang
Zhi Kui
ZK
Department of Physics, National University of Singapore, Singapore 117542, Singapore.
Lim
Hock Siah
HS
Zhang
Vanessa Li
VL
Goh
Jia Li
JL
Ng
Ser Choon
SC
Kuok
Meng Hau
MH
Su
Hai Lin
HL
Tang
Shao Long
SL
D003035:Cobalt / Q000032:analysis / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D004559:Electric Wiring / Q000295:instrumentation*; D058085:Iron Compounds / Q000032:analysis / Q000737:chemistry*; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D013113:Spin Labels
D058085:Iron Compounds; D013113:Spin Labels; D003035:Cobalt