Producción Científica Profesorado

Magnetic transition phase diagram of cobalt clusters electrodeposited on HOPG: Experimental and micromagnetic modelling study



Mendoza Huizar, Luis Humberto

2011

Magnetic transition phase diagram of cobalt clusters electrodeposited on HOPG: Experimental and micromagnetic modelling study M. Rivera, C.H. Rios-Reyes and L.H. Mendoza-Huizar. Journal of Magnetism and Magnetic Materials. Article in Press, 2011. http://dx.doi.org/10.1016/j.jmmm.2010.11.088


Abstract


The magnetic transition from mono- to multidomain magnetic states of cobalt clusters electrodeposited on highly oriented pyrolytic graphite electrodes was studied experimentally using Magnetic Force Microscopy. From these images, it was found that the critical size of the magnetic transition is dominated by the height rather than the diameter of the aggregate. This experimental behavior was found to be consistent with a theoretical single-domain ferromagnetic model that states that a critical height limits the monodomain state. By analyzing the clusters magnetic states as a function of their dimensions, magnetic exchange constant and anisotropy value were obtained and used to calculate other magnetic properties such as the exchange length, magnetic wall thickness, etc. Finally, a micromagnetic simulation study correctly predicted the experimental magnetic transition phase diagram.



Producto de Investigación




Artículos relacionados

Zinc Electrodeposition from Chloride Solutions onto Glassy Carbon Electrode

Kinetic study of the cobalt electrodeposition onto glassy carbon electrode from ammonium sulfate sol...

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Nucleation and growth of cobalt onto different substrates: Part I. Underpotential deposition onto a ...

Nucleation and growth of cobalt onto different substrates: Part II. The upd-opd transition onto a go...

Chemical Reactivity of Atrazine Employing the Fukui Function

Efecto de la composición del soporte sobre las estructuras superficiales de óxidos de níquel y molib...

A Semiempirical PM6 Study of Some Aminopyrimidine Derivatives and their Interaction with an Iron Sur...

Influence of the Crystallinity of the Substrate on Kinetic Parameters of Zinc Electrodeposition Proc...

Synthesis, Characterization and Catalytic Activity of Supported NiMo Catalysts