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Thermally activated annihilation of an individual domain in submicrometer nickel particles
Lok, J G S; Geim, A K; Wyder, U; Maan, J C; Dubonos, S V
Journal of Magnetism and Magnetic Materials. 1999;204(3):159-164.
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Abstract
We have used the technique of ballistic Hall micromagnetometry to study the annihilation process of an individual domain in sub-micron ferromagnetic nickel disks. The technique allows to detect changes in magnetization as low as 5 x 10(4) mu(B) over a wide range of temperatures (0.3 < T < 77 K). At low temperatures (T < 6 K) deviations from thermally activated switching occur, while at higher temperatures (6 < T < 77 K) the annihilation of a domain can be described by thermal activation over a single energy barrier. (C) 1999 Elsevier Science B.V. All rights reserved.
Keyword(s)
annihilation; ballistic hall micromagnetry; field; junction; single magnetic particles; submicron
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