Resonant oscillations of magnetic bubble domains with vertical Bloch lines

Resonant domain wall oscillations of bubbles are investigated with special attention to the dynamic behavior of Bloch lines and Bloch points. It is found that the localized inertial masses associated with these structures result in localized resonant oscillations at frequencies that are characteristic for the structures. The amplitude is concentrated near the respective structure, resulting in oscillatory wall flexure. Bubbles containing different wall structures (e.g. Bloch lines with and without a Bloch point) oscillate at two different frequencies.