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

Estudio de las Interacciones Ácido Húmico-Metales Pesados y Determinación de sus Constantes de Estab...

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Synthesis of Zn compounds derived from 1H-benzimidazol-2-ylmethanamine

THEORETICAL STUDY ON THE MODIFICATION OF ACTIVE SITES IN GOLD SURFACES MODELED AS FINITE CLUSTERS: I...

Magnetic transition phase diagram of cobalt clusters electrodeposited on HOPG: Experimental and micr...

ELECTROCHEMICAL STUDY ABOUT ZINC ELECTRODEPOSITION ONTO GCE AND HOPG SUBSTRATES

Underpotential deposition of cobalt onto polycrystalline platinum

Predicting the Phase Diagram of a Liquid Crystal Using the Convex Peg Model and the Semiempirical PM...

Do Spiroarsoranes Exhibit Polytopal Equilibrium in Solution?

Morphological and magnetic properties of cobalt nanoclusters electrodeposited onto HOPG