Analytical theory of the dipole-exchange oscillations in long ferromagnetic nanowires of elliptical cross-section in a transverse external magnetic field

作者：Golovach G P; Popov M A; Roussigne Y^*; Stashkevich A A; Zavislyak I V

来源：Journal of Magnetism and Magnetic Materials, 2015, 382: 252-264.

DOI：10.1016/j.jmmm.2015.01.077

• Elliptical ferromagnetic cylinder
• Dipole-exchange spin-wave oscillations
• Nickel nanowires
• High-frequency magnetization spatial profiles

The analytical theory of the dipole exchange spin wave excitations of ferromagnetic cylinders of elliptical cross section with the bias magnetic held perpendicular to the axis of the cylinder is presented. Explicit analytical expressions for the frequency spectrum and the magnetization spatial distribution are derived. Their evolution as a function of cross-section's aspect ratios has been investigated. The developed formalism allows successful interpretation of experimental Brillouin Light Scattering spectra obtained previously for Ni nano-wires both qualitatively and quantitatively. It also provides a tool for comprehensive analysis of phenomena, in which spatial distribution and polarization of high-frequency magnetization play crucial role.

• 出版日期2015-5-15