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Title: Spin waves in permalloy nanowires: The importance of easy-plane anisotropy
Authors: Nguyen, T.M.
Cottam, M.G.
Liu, H.Y.
Wang, Z.K. 
Ng, S.C. 
Kuok, M.H. 
Lockwood, D.J.
Nielsch, K.
Gösele, U.
Issue Date: 2006
Source: Nguyen, T.M., Cottam, M.G., Liu, H.Y., Wang, Z.K., Ng, S.C., Kuok, M.H., Lockwood, D.J., Nielsch, K., Gösele, U. (2006). Spin waves in permalloy nanowires: The importance of easy-plane anisotropy. Physical Review B - Condensed Matter and Materials Physics 73 (14) : -. ScholarBank@NUS Repository.
Abstract: Brillouin light scattering has been employed to study the magnetic-field dependence of the discrete spin waves in permalloy Ni80 Fe20 nanowires. When a small magnetic field is applied transverse to the nanowire, the results reveal a low-frequency mode, which is absent in the longitudinal case. A Hamiltonian-based microscopic theory for nanowires with inhomogeneous magnetization shows that the appearance of this mode, along with its higher-field behavior, is a significant consequence of a small easy-plane single-ion anisotropy at the nanowire surface. The calculations provide a good description of experimental data for both the transverse and longitudinal cases. © 2006 The American Physical Society.
Source Title: Physical Review B - Condensed Matter and Materials Physics
ISSN: 10980121
DOI: 10.1103/PhysRevB.73.140402
Appears in Collections:Staff Publications

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