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

Cobalt Electrodeposition Process from Electrolytic Baths based on CoSO4 and (NH4)2SO4. Influence of ...

Zinc Electrodeposition from Chloride Solutions onto Glassy Carbon Electrode

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

Effect of TiO2-Al2O3 sol-gel supports on the superficial Ni and Mo species in oxidized and sulfided ...

The role of temperature in copper electrocrystallization in ammoniachloride solutions

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

Electrochemical kinetic study about cobalt electrodeposition onto GCE and HOPG substrates from sulfa...

ELECTROCHEMICAL STUDY ABOUT ZINC ELECTRODEPOSITION ONTO GCE AND HOPG SUBSTRATES

Revisión de variables de diseño y condiciones de operación en la electrocoagulación

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane