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Journal of Magnetism and Magnetic Materials 272276 (2004) e1299e1300 Magnetic properties of lithographically defined rectangular
 

Summary: Journal of Magnetism and Magnetic Materials 272276 (2004) e1299e1300
Magnetic properties of lithographically defined rectangular
antidot permalloy arrays
C.C. Wang, A.O. Adeyeye*, C.C. Lin
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, Faculty of Engineering,
National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore
Abstract
We have investigated the magnetic properties of rectangular antidot 2 10 mm2
arrays embedded into 80 nm thick
continuous permalloy films with the inter-hole spacing of 2 and 6 mm: We observed that the presence of the rectangular
hole structures strongly modifies the shape of MH loops, when compared with the reference continuous film.
Specifically, the coercivity increases drastically as the inter-hole spacing is reduced. This is in agreement with our
magnetic force microscopy images. Marked changes in both the shape and sign of the magnetoresistance curve were
also observed.
r 2003 Elsevier B.V. All rights reserved.
PACS: 75.70.Kw; 75.30.Gw; 75.60.Ch; 75.47.m
Keywords: Antidot array; Magnetic domain; Anisotropy; Magnetotransport; Patterned film
Recently, there have been interests in the magnetic
properties of magnetic antidot arrays [16]. It has been
proposed to be a new method of storage of data with the

  

Source: Adeyeye, Adekunle - Department of Electrical and Computer Engineering, National University of Singapore

 

Collections: Physics; Materials Science