Summary: IOP PUBLISHING NANOTECHNOLOGY
Nanotechnology 19 (2008) 085302 (5pp) doi:10.1088/0957-4484/19/8/085302
Magnetoresistance behavior of
ferromagnetic nanorings in a ring­wire
hybrid configuration
S Jain, C C Wang and A O Adeyeye1
Information Storage Materials Laboratory, Department of Electrical and Computer
Engineering, National University of Singapore, 117576, Singapore
E-mail: eleaao@nus.edu.sg (A O Adeyeye)
Received 12 October 2007, in final form 13 December 2007
Published 1 February 2008
Online at stacks.iop.org/Nano/19/085302
Abstract
We present a technique for probing the magnetic configurations in ferromagnetic rings
electrically without placing the electrical contact leads directly on the nanorings, but on wires
attached to the ring structures. The magnetic configurations in pseudo spin valve rectangular
and elliptical rings of width in the range from 60 to 300 nm have been systematically mapped
using this technique. The giant magnetoresistance (GMR) responses for both the rings exhibit
distinct switching fields and features corresponding to identifiable magnetization states in
different segments of the nanostructures.

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

Collections: Physics; Materials Science