Effective magnetization damping for a dynamical spin texture in metallic ferromagnet

• Опубліковано в: : Физика низких температур
• Дата: 2015
• Автори: Sukhostavets, O.V., Gonzalez, J.M., Guslienko, K.Y.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2015
• Теми: К 80-летию уравнения Ландау–Лифшица
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/128081
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Effective magnetization damping for a dynamical spin texture in metallic ferromagnet / O.V. Sukhostavets, J.M. Gonzalez, K.Y. Guslienko // Физика низких температур. — 2015. — Т. 41, № 10. — С. 989–996. — Бібліогр.: 35 назв. — англ.

An additional magnetization damping for an inhomogeneous spin texture in metallic ferromagnets is calculated
 on the basis of the s–d exchange model. The effect of conduction electrons on the magnetization dynamics is
 accounted for the case of slowly varying spin texture within adiabatic approximation by using a coordinate transformation
 to the local quantization axis. The moving magnetic vortex in a circular nanodot made of permalloy is
 considered as an example. The dependence of the damping on the dot geometrical sizes is obtained. It is found
 that the additional damping can reach up to 50% of magnitude of the phenomenological Gilbert damping in the
 Landau–Lifshitz equation of magnetization motion and should be taken into account for any inhomogeneous
 spin texture dynamics in ferromagnetic metals.