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12 Jan 1998

Volume 72, Issue 2, pp. 135-266

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Magnetization reversal in long chains of submicrometric Co dots

J. I. Martín, J. Nogués, Ivan K. Schuller, M. J. Van Bael, K. Temst, C. Van Haesendonck, V. V. Moshchalkov, and Y. Bruynseraede

Appl. Phys. Lett. 72, 255 (1998); http://dx.doi.org/10.1063/1.120702 (3 pages) | Cited 26 times

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Show Abstract
Long chains of 400 nm diam Co dots prepared by combined electron-beam lithography exhibit interesting magnetotransport properties. The magnetoresistance of the chains of dots is markedly different from single Co films, indicating a strongly modified magnetization reversal process. Magnetic force microscopy (MFM) shows that, after magnetic saturation, in the remanent state the single-domain dots are all oriented with their magnetic moment along the chain. A comparison of the magnetoresistance and the MFM reveals that the magnetization reversal occurs by coherent rotation of the magnetic moment in the single-domain dots forming the chain. © 1998 American Institute of Physics.
Show PACS
75.50.Tt Fine-particle systems; nanocrystalline materials
72.15.Gd Galvanomagnetic and other magnetotransport effects
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.60.Ch Domain walls and domain structure
07.79.Pk Magnetic force microscopes
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