TY - JOUR
T1 - Theoretical study of thermally activated magnetization switching under microwave assistance
T2 - Switching paths and barrier height
AU - Suto, H.
AU - Kudo, K.
AU - Nagasawa, T.
AU - Kanao, T.
AU - Mizushima, K.
AU - Sato, R.
AU - Okamoto, S.
AU - Kikuchi, N.
AU - Kitakami, O.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/3/2
Y1 - 2015/3/2
N2 - Energy barrier height for magnetization switching is theoretically studied for a system with uniaxial anisotropy in a circularly polarized microwave magnetic field. A formulation of the Landau-Lifshitz-Gilbert equation in a rotating frame introduces an effective energy that includes the effects of both the microwave field and static field. This allows the effective-energy profiles to rigorously describe the switching paths and corresponding barrier height, which govern thermally activated magnetization switching under microwave assistance. We show that fixed points and limit cycles in the rotating frame lead to various switching paths and that under certain conditions, switching becomes a two-step process with an intermediate state.
AB - Energy barrier height for magnetization switching is theoretically studied for a system with uniaxial anisotropy in a circularly polarized microwave magnetic field. A formulation of the Landau-Lifshitz-Gilbert equation in a rotating frame introduces an effective energy that includes the effects of both the microwave field and static field. This allows the effective-energy profiles to rigorously describe the switching paths and corresponding barrier height, which govern thermally activated magnetization switching under microwave assistance. We show that fixed points and limit cycles in the rotating frame lead to various switching paths and that under certain conditions, switching becomes a two-step process with an intermediate state.
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U2 - 10.1103/PhysRevB.91.094401
DO - 10.1103/PhysRevB.91.094401
M3 - Article
AN - SCOPUS:84924347979
SN - 1098-0121
VL - 91
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 094401
ER -