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Switching fields and magnetostatic interactions of thin film magnetic nanoelements

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3 Author(s)
Kirk, K.J. ; University of Glasgow, Glasgow, G12 8QQ, Scotland ; Chapman, J.N. ; Wilkinson, C.D.W.

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Switching fields of magnetic elements with nanometric dimensions have been investigated by Lorentz microscopy using a transmission electron microscope. Acicular elements of Co and Ni80Fe20 were fabricated by electron beam lithography and lift-off techniques. They were 1.6–3.5 μm long, 200 nm wide, and 20–50 nm thick, with flat rectangular ends or triangular pointed ends, and were patterned in linear arrays with center-to-center spacing ranging from 7 μm to 250 nm. Switching fields and reversal behavior of the elements were found to depend strongly on the shape of the ends and, in a closely packed array, on element separation, thereby providing a way of controlling their magnetic properties. © 1997 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:71 ,  Issue: 4 )

Date of Publication:

Jul 1997

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