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Analysis of magnetoresistance contribution in ring-shaped ferromagnetic C. C. Wang,a
 

Summary: Analysis of magnetoresistance contribution in ring-shaped ferromagnetic
structures
C. C. Wang,a
S. Jain, and A. O. Adeyeyeb
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National
University of Singapore, 4 Engineering Drive 3, Singapore-117576, Singapore
Received 23 July 2007; accepted 3 October 2007; published online 4 December 2007;
publisher error corrected 10 December 2007
We investigate the magnetoresistance MR contribution in a ring-shaped ferromagnetic structure
with local current and voltage contacts. We find out that overall MR response of the ring can be
simply expressed as a linear combination of the MR ratios of the respective ring segments. The
theoretical analysis has been confirmed through both micromagnetic simulations and MR
measurements on a rectangular ring structure. The findings from this work provide a fast and
convenient way for the interpretation of magnetization reversal process in ferromagnetic ring
structures and magnetic random access memory design. 2007 American Institute of Physics.
DOI: 10.1063/1.2817937
I. INTRODUCTION
Ferromagnetic ring-shaped structures have recently re-
ceived increasing interest. Extensive studies have shown that
ferromagnetic rings exhibit intriguing magnetic states and

  

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

 

Collections: Physics; Materials Science