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Magnetoresistance behavior of elliptical ring nanomagnets in close proximity with magnetic elements
 

Summary: Magnetoresistance behavior of elliptical ring nanomagnets in close
proximity with magnetic elements
S. Jain and A. O. Adeyeyea
Department of Electrical and Computer Engineering, Information Storage Materials Laboratory, National
University of Singapore, Singapore 117576, Singapore
Presented 14 November 2008; received 12 September 2008; accepted 25 November 2008;
published online 23 February 2009
We have investigated the giant magnetoresistance GMR responses of the pseudospin valve
elliptical rings in close proximity with individual magnetic elements. Significant modifications of
the GMR responses were observed due to the effects of magnetostatic coupling between the rings
and the magnetic elements. We observed that the vortex state stability is significantly sensitive to the
position, orientation of the magnetic elements, and the direction of the applied field. We also
investigated the switching field reproducibility of the rings for onionvortex and vortexonion
transitions and observed that the ring with asymmetrically placed magnetic elements shows the most
reproducible switching states. 2009 American Institute of Physics. DOI: 10.1063/1.3072753
I. INTRODUCTION
Ferromagnetic nanostructures especially magnetic rings
have recently received increasing interest due to potential
applications in magnetic random access memory cell
devices1

  

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

 

Collections: Physics; Materials Science