Spin dependent scattering of a domain-wall of controlled size

Details Spin dependent scattering of a domain-wall of controlled size Spin dependent scattering of a domain-wall of controlled size

1999-09-15

arxiv.org/abs/cond-mat/9909229v1

Physics

Condensed Matter

Materials Science

9 pages, 13 figures

Scientific paper

10.1103/PhysRevB.61.12216

Magnetoresistance measurements in the CPP geometry have been performed on single electrodeposited Co nanowires exchange biased on one side by a sputtered amorphous GdCo layer. This geometry allows the stabilization of a single domain wall in the Co wire, the thickness of which can be controlled by an external magnetic field. Comparing magnetization, resistivity, and magnetoresistance studies of single Co nanowires, of GdCo layers, and of the coupled system, gives evidence for an additional contribution to the magnetoresistance when the domain wall is compressed by a magnetic field. This contribution is interpreted as the spin dependent scattering within the domain wall when the wall thickness becomes smaller than the spin diffusion length.

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