Title :
Spectral study of oxide-shell in core-shell iron nanoclusters
Author :
Singh, M. Tarsem ; Mccloy, J.S. ; Kukkadapu, R. ; Qiang, Y.
Author_Institution :
Phys. Dept., Univ. of Idaho, Moscow, ID, USA
Abstract :
The structural and magnetic properties of oxide passivated magnetic nanoclusters (NCs) have gained popularity and applications in various fields like data storage, spin valves, and recently in nuclear waste treatment [1-4]. In the present work, we consider an iron/iron-oxide (Fe/Fe-oxide) core/shell NC, which consists of Fe-core surrounded by Fe-oxide shell. An oxide passivation/alteration of the surface Fe-core represents the effective medium for transmission of exchange interaction and conduction electrons between the ferromagnetic metallic cores. It can easily alter the magnetic behavior of cluster depending on the chemical and lattice structure of the oxide-shell. Oxidation behavior of Fe-core is highly dependent on factors such as temperature, oxygen partial pressure, and time, in other words, the type of synthesis process primarily influences the overall oxide shell thickness. Also, irradiation has considerable influence on the oxide-shell of core-shell NCs.
Keywords :
chemical structure; core-shell nanostructures; exchange interactions (electron); ferromagnetic materials; iron; iron compounds; oxidation; passivation; FeO-Fe; chemical structure; conduction electrons; core-shell iron nanoclusters; data storage; exchange interaction; ferromagnetic metallic cores; iron-iron-oxide core-shell NC; lattice structure; magnetic properties; nuclear waste treatment; oxide passivated magnetic nanoclusters; oxide passivation-alteration; oxygen partial pressure; spin valves; structural properties; surface Fe-core; Coercive force; Iron; Magnetic cores; Magnetic properties; Magnetometers; Spectroscopy; X-ray scattering;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157445
