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Magnetoresistance behavior of submicron Ni80Fe20 wires A. O. Adeyeye,a)

Summary: Magnetoresistance behavior of submicron Ni80Fe20 wires
A. O. Adeyeye,a)
G. Lauhoff, J. A. C. Bland,b)
C. Daboo, D. G. Hasko, and H. Ahmed
Cavendish Laboratory, Madingley Road, Cambridge, CB3 OHE, United Kingdom
Received 9 July 1996; accepted for publication 3 December 1996
We report the evolution of the magnetoresistance MR and magnetization behavior of Ni80Fe20 wire
arrays as the width w is reduced from 200 to 0.3 m. At around 1.5 m width, the hysteretic
behavior seen in continuous films shows the near reversible behavior characteristic of spin rotation
processes. At low field (H Ms), the anisotropic magnetoresistance determines the response and is
strikingly size dependent. At high field (H Ms), the linear MR response to the in-plane
perpendicular hard axis field suggests a bulklike transverse MR effect. 1997 American Institute
of Physics. S0003-6951 97 00506-8
The magnetic properties of ``nanostructures'' for ex-
ample, nm scale dots, wires, and structured elements is of
rapidly growing interest due to advances in lithographic and
other techniques, and developments in computational
As a characteristic size approaches key mag-
netic length scales, e.g., the domain wall width tens of nm to


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


Collections: Physics; Materials Science