Magnetic properties and giant magnetoresistance in electrodeposited Co?Ag granular films - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Magnetism and Magnetic Materials Année : 2006

Magnetic properties and giant magnetoresistance in electrodeposited Co?Ag granular films

Résumé

Small cobalt particles embedded in a silver matrix have been prepared using the electrodeposition technique. The size of the clusters is controlled by the deposition potential and the Co growth time. Structural, magnetic and magneto-transport properties of Co–Ag samples have been investigated as a function of the Co concentration between 2 and 40 at% cobalt. Superparamagnetic behavior is evidenced for the low contents of cobalt while long-range magnetic order appears at higher Co concentrations. The particles size has been determined from magnetic properties and from the X-ray diffraction technique, and varies between 3.5 and 9 nm. Magnetoresistance passes through a maximum as a function of the cobalt concentration. A maximum of ~ 4% GMR is obtained at room temperature while GMR reaches a value of 14% at 10 K.

Domaines

Matériaux

Dates et versions

hal-00333539 , version 1 (23-10-2008)

Identifiants

Citer

Salah Kenane, Jean Voiron, Nassima Benbrahim, Eric Chaînet, Florence Robaut. Magnetic properties and giant magnetoresistance in electrodeposited Co?Ag granular films. Journal of Magnetism and Magnetic Materials, 2006, 29 (2), pp. 99-106. ⟨10.1016/j.jmmm.2005.02.068⟩. ⟨hal-00333539⟩
76 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More