Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Journal of Magnetism and Magnetic Materials 320 (2008) 17811786 Field-dependent evolution of magnetic states in Co ring arrays
 

Summary: Journal of Magnetism and Magnetic Materials 320 (2008) 17811786
Field-dependent evolution of magnetic states in Co ring arrays
C.C. Wanga
, J. Wanga
, A.O. Adeyeyea,, N. Singhb
a
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore,
4 Engineering Drive 3, Singapore 117576, Singapore
b
Institute of Microelectronics, 11 Science Park Road, Singapore Science Park II, 117685 Singapore, Singapore
Received 22 November 2007; received in revised form 21 January 2008
Available online 11 March 2008
Abstract
We present a systematic study of field-dependent evolution in the magnetization reversal process of elongated Co ring arrays using in-
situ field magnetic force microscopy. We observed that, the rings typically undergo a uniform-onion-vortex-reverse onion-reverse
uniform spin-state transition as the field is swept along the major axis of the rings. However, the switching field distribution in the arrays
generally leads to each transition occupying a wide range of fields, which results in the observation of coexistence of different
magnetization states at lower field. The magnetization reversal sequence has also been verified by micromagnetic simulations, which
show good agreement with our experimental data.
r 2008 Elsevier B.V. All rights reserved.

  

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

 

Collections: Physics; Materials Science