Giant magnetoresistance in hybrid nanostructures

J.L. DUVAIL; A. BARTHÉLÉMY; L.B. STEREN; R. MOREL,; F. PETROFF; M. SUSSIAU; M. WIEDMANN; A. FERT; P. HOLODY; R. LOLOEE; P.A. SCHROEDER

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

ELSEVIER SCIENCE BV

Año: 1995 vol. 151 p. 324 - 332

0304-8853

   We describe the Giant Magnetoresistance (GMR) properties of multilayered structures including continuous layers of permalloy (Ni80Fe20) and discontinuous layers of cobalt separated by layers of copper or silver. These hybrid structures exhibit large GMR ratios with high slopes at low field (as high as 7%/Oe). They are also very convenient for an accurate determination of the angular dependence of the GMR and interesting to discuss the origin of the GMR. We finally analyse GMR measurements performed with the current perpendicular to the layers and separate the bulk and interface contributions.