Magnetic properties and giant magnetoresistance in electrodeposited Co-Ag granular films
Identifieur interne : 000876 ( Main/Curation ); précédent : 000875; suivant : 000877Magnetic properties and giant magnetoresistance in electrodeposited Co-Ag granular films
Auteurs : S. Kenane [France, Algérie] ; J. Voiron [France] ; N. Benbrahim [Algérie] ; E. Chainet [France] ; F. Robaut [France]Source :
- Journal of magnetism and magnetic materials [ 0304-8853 ] ; 2006.
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- Pascal (Inist)
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- KwdEn :
Abstract
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.
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<series><title level="j" type="main">Journal of magnetism and magnetic materials</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical composition</term>
<term>Cobalt alloys</term>
<term>Electrodeposition</term>
<term>Giant magnetoresistance</term>
<term>Granular structure</term>
<term>Magnetic hysteresis</term>
<term>Magnetic properties</term>
<term>Magnetization</term>
<term>Particle size</term>
<term>Silver alloys</term>
<term>Superparamagnetism</term>
<term>Transition element alloys</term>
<term>Transport processes</term>
<term>XRD</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Propriété magnétique</term>
<term>Magnétorésistance géante</term>
<term>Dépôt électrolytique</term>
<term>Structure granulaire</term>
<term>Phénomène transport</term>
<term>Superparamagnétisme</term>
<term>Composition chimique</term>
<term>Dimension particule</term>
<term>Diffraction RX</term>
<term>Aimantation</term>
<term>Hystérésis magnétique</term>
<term>Argent alliage</term>
<term>Cobalt alliage</term>
<term>Métal transition alliage</term>
<term>7547D</term>
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<front><div type="abstract" xml:lang="en">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.</div>
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