Summary: Journal of Magnetism and Magnetic Materials 320 (2008) 113119
Direct mapping of the spin states in mesoscopic anti-structures
, C.C. Wangb
, A.O. Adeyeyeb,Ã
Institute of Microelectronics, 11 Science Park Road, Singapore Science Park II, Singapore 117685, Singapore
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore,
4 Engineering Drive 3, Singapore 117576, Singapore
Received 28 March 2007; received in revised form 15 May 2007
Available online 25 May 2007
We report on the systematic evolution of the micromagnetism in mesoscopic Ni80Fe20 anti-structures of complex geometrical shapes
such as anti-ring, anti-U and anti-C structures. By using magnetic force microscopy (MFM) techniques, we observed directly that the
local magnetic spin states at remanence are strongly influenced by the anti-structure geometry and field orientation due to shape-induced
magnetic anisotropy. Our experimental results are in very good agreement with micromagnetic simulations.
r 2007 Elsevier B.V. All rights reserved.
PACS: 75.60.Ch; 75.60.Jk; 75.60.Ej
Keywords: Antidot; MFM; Micromagnetism; Shape anisotropy