TY - JOUR
T1 - Spin dynamics in ferromagnetic resonance for nano-sized magnetic dot arrays
T2 - Metrology and insight into magnetization dynamics
AU - Noh, Seungmo
AU - Monma, Daisuke
AU - Miyake, Kousaku
AU - Doi, Masaaki
AU - Kaneko, Tomoaki
AU - Imamura, Hiroshi
AU - Sahashi, Masashi
N1 - Funding Information:
This work was supported in part through the Storage Research Consortium (SRC) and Center of Education and Research for Information Electronics systems of Global COE Program, Japan.
PY - 2011/10
Y1 - 2011/10
N2 - The ferromagnetic resonance response (FMR) in the variously sized magnetic dot arrays was measured by using network-analyzer ferromagnetic resonance technique. We first demonstrated that the magnetization excitation related to the susceptibility χzx by the coplanar wave-guide (CPW). In this χzx, the edge mode excitation modified the FMR response appreciably and found that the damping constant is strongly affected by the size of the nano-magnet. In larger nano-magnets, two edge modes were observed. We showed that this edge mode can be exploited as a means to separately characterize the magnetization state of the nano-magnet as well as the size variation. In addition, the simulation results are also presented here to account for the experimental observations.
AB - The ferromagnetic resonance response (FMR) in the variously sized magnetic dot arrays was measured by using network-analyzer ferromagnetic resonance technique. We first demonstrated that the magnetization excitation related to the susceptibility χzx by the coplanar wave-guide (CPW). In this χzx, the edge mode excitation modified the FMR response appreciably and found that the damping constant is strongly affected by the size of the nano-magnet. In larger nano-magnets, two edge modes were observed. We showed that this edge mode can be exploited as a means to separately characterize the magnetization state of the nano-magnet as well as the size variation. In addition, the simulation results are also presented here to account for the experimental observations.
KW - Coplanar waveguide (CPW)
KW - damping constant
KW - magnetic dot array
KW - magnetization dynamics
KW - network analyzer ferromagnetic resonance (NA-FMR)
KW - rf magnetic susceptibility
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U2 - 10.1109/TMAG.2011.2150741
DO - 10.1109/TMAG.2011.2150741
M3 - Article
AN - SCOPUS:80053550822
VL - 47
SP - 2387
EP - 2390
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 10
M1 - 6027760
ER -