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

A theoretical quantum study on the distribution of electrophilic and nucleophilic active sites on Ag...

The role of temperature in copper electrocrystallization in ammoniachloride solutions

ELECTROCHEMICAL STUDY ABOUT ZINC ELECTRODEPOSITION ONTO GCE AND HOPG SUBSTRATES

Hydrogen bond studies in substituted N-(2-hydroxyphenyl)--2-[(4-methylbenzenesulfonyl)amino]acetamid...

Underpotential deposition of cobalt onto polycrystalline platinum

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Theoretical and Experimental Study of Cobalt Nucleation and Growth onto Gold Substrate with Differen...

Evaluación de Esteroides Aromáticos como Indicadores de Madurez Térmica en Extractos de Roca

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

Cobalt electrodeposition on polycrystalline palladium. Influence of temperature on kinetic parameter...