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Spin state evolution and magnetic anisotropy of elongated Ni80Fe20 A. O. Adeyeyea
 

Summary: Spin state evolution and magnetic anisotropy of elongated Ni80Fe20
nanorings
A. O. Adeyeyea
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering,
National University of Singapore, 4 Engineering Drive 3, Singapore-117576
N. Singh
Institute of Microelectronics, 11 Science Park Road, Singapore Science Park II, Singapore-117685
S. Goolaup
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering,
National University of Singapore, 4 Engineering Drive 3, Singapore-117576
Received 12 April 2005; accepted 1 September 2005; published online 1 November 2005
We have investigated the evolution of magnetic spin states and in-plane magnetic anisotropy in
arrays of elongated Ni80Fe20 rings. Large area 4 4 mm2
elongated Ni80Fe20 nanorings of
thickness in the range from 5 to 60 nm were fabricated using deep ultraviolet lithography at 248 nm
exposing wavelength. The magnetic spin states and the magnetization reversal processes are
strongly dependent on the ring thickness and in-plane magnetic anisotropy due to the elongation of
the rings. Our experimental results are in a very good agreement with micromagnetic simulations.
2005 American Institute of Physics. DOI: 10.1063/1.2099511
I. INTRODUCTION

  

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

 

Collections: Physics; Materials Science