Producción Científica Profesorado

Complementary atomic force microscopy and magnetic force microscopy study for the magnetic transition of cobalt clusters onto gold substrates



Mendoza Huizar, Luis Humberto

2020

M. Rivera, F. I. Martinez-Vado, L. H. Mendoza-Huizar, I. Betancourt. Complementary atomic force microscopy and magnetic force microscopy study for the magnetic transition of cobalt clusters onto gold substrates. Revista Mexicana de Fisica. 66 (2020) 23-29. DOI: 10.31349/RevMexFis.66.23


Abstract


Atomic and magnetic force microscopy were employed in order to investigate the local magnetic state of individual cobalt clusters electrodeposited onto gold electrodes. The analysis indicated that the diameter of the clusters was similar regardless of the potential formation, or growth stage, but the height and surface coverage changed as the potential augmented. Individual examination of the clusters showed that the height determined the magnetic transition from the single to the multi domain state. By using a theoretical single-domain ferromagnetic model in terms of the clusters dimensions, the magnetic exchange constant at different potential voltages was obtained, which was higher than the cobalt bulk value. In addition, a micromagnetic simulation study was employed to validate the experimental results, and it correctly confirmed the experimental magnetic transition. In addition, a fcc crystalline structure and some insights of the clusters growth mechanism on the gold surface were inferred from the results.



Producto de Investigación




Artículos relacionados

Análisis del Comportamiento Presión-Temperatura en la Transición Isotrópico-Nemático del p-Azoxianis...

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

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

ELECTROCHEMICAL STUDY ABOUT ZINC ELECTRODEPOSITION ONTO GCE AND HOPG SUBSTRATES

The role of temperature in copper electrocrystallization in ammoniachloride solutions

Analysis of the experimental pressuretemperature behavior in the isotropicnematic phase transition f...

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

Bioacumulación y daños genotóxicos en Pez Cebra (Danio rerio) por arsénico en aguas de Zimapán, Hida...

Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Dope...

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