Journal
JOURNAL OF APPLIED PHYSICS
Volume 111, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3672402
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Funding
- Department of Science and Technology, Government of India [SR/NM/NS-09/2007, INT/EC/CMS (24/233552), FTP/PS-71/2007, INT/JP/JST/P-23/09]
- Japan Science and Technology Agency [09158876]
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The anisotropy in the collective precessional dynamics with the variation of azimuthal angle of the bias magnetic field is studied in arrays of permalloy (Ni80Fe20) nanoelements by an all-optical time-resolved Kerr microscope. When the nanoelements are very closely spaced (inter-element separation = 50 nm), a gradual transition from completely uniform collective regime to a completely non-collective regime is observed as the azimuthal angle varies from 0 degrees to 45 degrees. On the other hand, for inter-element separation of 100 nm, a non-uniform collective dynamics is observed at 0 degrees and a non-collective dynamics is observed at 45 degrees but no clear trend in the transition is observed. (C) 2012 American Institute of Physics. [doi:10.1063/1.3672402]
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