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Elsevier, Journal of Magnetism and Magnetic Materials, 3(293), p. 863-871

DOI: 10.1016/j.jmmm.2004.12.009

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Mobility of domain wall motion in the permalloy layer of a spin-valve-like trilayer

Journal article published in 2005 by K. Fukumoto, W. Kuch, J. Vogel ORCID, J. Camarero, S. Pizzini, F. Offi, Y. Pennec, M. Bonfim, A. Fontaine, J. Kirschner
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

The magnetization reversal of the magnetically soft permalloy (Fe20Ni80) layer in a spin-valve-like FeNi/Cu/Co trilayer was studied using photoelectron emission microscopy combined with X-ray magnetic circular dichroism, which allows to image the magnetic domain structure in an element-selective way. Nanosecond-short magnetic field pulses with amplitudes between 3.3 and 16.3 mT were applied one by one to reverse the magnetization of the FeNi layer. Images of the magnetic domain structure were taken after application of each pulse, and the mobility of magnetic domain wall motion in the FeNi layer was deduced. The reversal mechanism of the FeNi layer was found to depend on the applied pulse length, amplitude, and on the energy and direction of the coupling between the two ferromagnetic layers.