X. Portier et al., CONTRIBUTION OF THE MAGNETIC-FIELD-INDUCED BY THE CURRENT PASSING THROUGH A SPIN-VALVE ELEMENT, Journal of magnetism and magnetic materials, 187(2), 1998, pp. 145-153
In situ experiments in a Lorentz microscope have been performed on act
ive spin-valve elements, and a correlation between magnetoresistance a
nd the magnetic domain structure is shown. The presence of a magnetic
field induced by the applied current is clearly demonstrated. A simple
model is presented, which is in good agreement with the experimental
data. In addition, the effect of stray-held coupling between the ferro
magnetic layers, arising because of the free magnetic poles at the edg
es of the element, has been observed. (C) 1998 Elsevier Science B.V. A
ll rights reserved.