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IEEE TRANSACTIONS ON MAGNETICS, VOL. 44, NO. 7, JULY 2008 1935 Reversal Mechanisms in Ferromagnetic Nanostructures
 

Summary: IEEE TRANSACTIONS ON MAGNETICS, VOL. 44, NO. 7, JULY 2008 1935
Reversal Mechanisms in Ferromagnetic Nanostructures
A. O. Adeyeye, S. Goolaup, N. Singh, W. Jun, C. C. Wang, S. Jain, and D. Tripathy
Information Storage Materials Laboratory (ISML), Department of Electrical and Computer Engineering,
National University of Singapore, 117576 Singapore
We present a systematic investigation of the magnetic properties and magnetization reversal processes in arrays of magnetic nanostruc-
tures. We observed in magnetic rings that the transitions between different equilibrium states are strongly dependent on magnetostatic
interactions. For magnetic nanowires, a transition from coherent rotation to curling mode of reversal as the thickness of the wire is
varied for fixed lateral dimensions was observed. We found in anti-dot nanostructures that the magnetic anisotropy can be controlled by
engineering the lattice geometry.
Index Terms--Magnetic nanostructures, magnetization reversal, magnetostatic interactions.
I. INTRODUCTION
ADVANCES in nanofabrication techniques (top-down and
bottom-up approaches), nano-characterization tools, and
advanced computational methods have renewed worldwide
interest in the properties of nanomagnets. Magnetic nanos-
tructures are interesting both from a fundamental viewpoint
and also due to their potential in a wide range of applications
such as nonvolatile magnetic random access memory (MRAM)
[1], magnetic recording read heads [2], field programmable

  

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

 

Collections: Physics; Materials Science