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Direct comparison of magnetization reversal process in rectangular and elliptical ring nanomagnets
 

Summary: Direct comparison of magnetization reversal process in rectangular and
elliptical ring nanomagnets
S. Jain, C. C. Wang, and A. O. Adeyeyea
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National
University of Singapore, Singapore 117576, Singapore
Presented on 7 November 2007; received 16 August 2007; accepted 26 September 2007;
published online 23 January 2008
We present a comparative study of the magnetization reversal process in rectangular and elliptical
ferromagnetic ring structures using various contact configurations. We observed that the magnetic
and transport properties are strongly dependent on the ring shape and contact geometry.
Magnetoresistance measurements in combination with micromagnetic simulations have been used to
understand the magnetization reversal mechanism in both the ring geometries. 2008 American
Institute of Physics. DOI: 10.1063/1.2828616
The phenomena of domain wall DW pinning and de-
pinning in ferromagnetic ring structures have recently re-
ceived increasing interest due to potential applications in
magnetic random access memory MRAM cell devices.1,2
The effect of magnetic DWs on the transport properties of
such structures is of particular interest. Efforts have also
been made to study the DW evolution during magnetization

  

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

 

Collections: Physics; Materials Science