Magnetoresistance of Cu–Mn–Al melt-spun ribbons containing the system of interacting ferromagnetic inclusions

• Published in: Journal of magnetism and magnetic materials Vol. 323; no. 6; pp. 763 - 766
• Main Authors: Konoplyuk, S.M., Kokorin, V.V., Kolomiets, O.V., Perekos, A.E., Nadutov, V.M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2011; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Copper; Cu–Mn–Al melt-spun ribbon; Diamagnetism, paramagnetism and superparamagnetism; Domain effects, magnetization curves, and hysteresis; Electronic conduction in metals and alloys; Electronic transport in condensed matter; Exact sciences and technology; Ferromagnetism; Galvanomagnetic and other magnetotransport effects; Granular alloy; Interparticle interaction; Magnetic properties; Magnetic properties and materials; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Magnetoresistance; Magnetoresistivity; Melt spinning; Nanoparticles; Physics; Ribbons; Temperature dependence; Cu–Mn–Al melt-spun ribbon; Interparticle interaction; Granular alloy; Magnetization; Solid inclusion; Ferromagnetic materials; Melt spinning; Superparamagnetism; Granular structure; Nanoparticles; Magnetic particles; Aluminium alloys; Nanocomposites; Cu-Mn-Al melt-spun ribbon; Particle interactions; Copper alloys; Manganese alloys; Ferromagnetism; Magnetoresistance; Transition element alloys; Magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2010.10.041

Cu–Mn–Al melt-spun ribbons of two compositions were studied to find out the influence of the collective behavior of diluted ferromagnetic nanoparticles on magnetotransport properties. The sample with a lower volume percentage of particles demonstrates magnetic behavior characteristic for the superparamagnetic state while the other one demonstrates ferromagnetic-like ordering. It is shown that the collective behavior of the system in both ribbons correlates with the temperature dependence of magnetoresistance. ► Spin glass-like ordering is provided by the dipolar interaction between particles. ► Ferromagnetic-like ordering results from the exchange interaction between particles. ► Temperature dependence of magnetoresistance is different for different magnetic states.