Title :
Collective mode excitation assist for magnetization reversal
Author :
Elyasi, M. ; Bhatia, C.S. ; Yang, H.
Author_Institution :
Electr. & Comput. Eng. Dept., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
The large arrays of magnetic dots are the basis of magnonic crystals and bit patterned media. Resonance behaviors of densely packed magnetic arrays have been a subject of recent intensified research for their applications in microwave technology or signal transfer. Structural or magnetization non-uniformities in magnonic crystals lead to the appearance of defect modes, resulting in the modification of the magnon band-structure. It has been demonstrated experimentally that the state of a vortex matrix, is selectively formed under different frequencies of microwave excitation.
Keywords :
band structure; magnetisation reversal; magnons; bit patterned media; collective mode excitation assist; defect modes; densely packed magnetic arrays; magnetic dot arrays; magnetization nonuniformity; magnetization reversal; magnon band-structure modification; magnonic crystals; microwave excitation frequencies; resonance behaviors; signal transfer; structural nonuniformity; vortex matrix state; Absorption; Crystals; Magnetic resonance; Magnetic switching; Microwave oscillators; Switches;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157145
