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Probing the magnetic states in mesoscopic rings by synchronous transport measurements in ring-wire hybrid configuration
 

Summary: Probing the magnetic states in mesoscopic rings by synchronous
transport measurements in ring-wire hybrid configuration
S. Jain and A. O. Adeyeyea
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering,
National University of Singapore, Singapore 117576, Singapore
Received 3 April 2008; accepted 30 April 2008; published online 22 May 2008
The magnetization reversal of individual rings has been mapped using synchronous
magnetotransport measurement of ring-wire hybrid structures. This method of characterization
eliminates the effect of both short circuiting introduced by placing the electrical contact probes
directly on the ring and the dependence of the magnetotransport response on the contact
configuration used. We have characterized the switching behavior of circular and elliptical ring
elements and observed clearly distinguishable spin states for different ring shapes. 2008
American Institute of Physics. DOI: 10.1063/1.2936089
Magnetization reversal process in ring geometries has
been extensively investigated in recent years.13
Of particular
interest has been the ring geometry, which undergoes rever-
sal from bidomain or onion state to flux closure vortex state
and then to reverse-onion state. The control of the vortex
chirality, also using asymmetric ring geometries,46

  

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

 

Collections: Physics; Materials Science