Magnetic Nanoparticles: A Study by Synchrotron Radiation and by Adriana I. Figueroa

By Adriana I. Figueroa

Magnetic nanoparticles (NPs) are discovering their position in lots of glossy applied sciences equivalent to electronics (memory or spintronic units) and drugs (contrast media, electromagnetic thermal remedy) to call quite a few examples. the appliance of recent thoughts according to synchrotron radiation, particularly X-ray spectroscopies, in addition to an rf transverse susceptibility probe, outfitted advert hoc, allowed the writer to enquire numerous sessions of magnetic NPs with different functions. for instance, the attention-grabbing anisotropic houses of CoW and CoPt NPs published new magnetic behaviour and levels. Gold NPs ready on a organic template from Sulfolobus acidocaldarius S-layer, have been proven to own intrinsic magnetism as a result of the electron trade with the sulfur atoms of the template. Silica and oleic acid covered magnetite NPs confirmed very good human compatibility whereas protecting the majority magnetic figures of advantage. either macroscopic and microscopic houses of a majority of these NPs, hitherto unexplained, were published for the 1st time.

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Lett. 75, 3748–3751 (1995) 18. C. Piamonteze, P. F. de Groot, Accuracy of the spin sum rule in XMCD for the transition-metal l edges from manganese to Copper. Phys. Rev. B 80, 184410 (2009) 19. V. J. Singh, N. Kawamura, M. Suzuki, T. Ishikawa, Phys. Rev. B 74, 064411 (2006) Chapter 3 Structural and Magnetic Properties of Amorphous Co–W Alloyed Nanoparticles This section is devoted to investigate a system of amorphous Co–W alloy nanoparticles (NPs). , particle sizes and interparticle distances. This potentiality has been expanded to study the magnetic properties of the amorphous Co–W NPs.

Size distributions for cross section and plan view configurations for the a samples series are shown in Fig. 6 nm, and in Fig. 7 nm. , there is a slight difference between both values. 5 nm). Thus, Co–W particles have an oblate shape. Digital analysis of the images obtained in cross section for samples from the b series were also performed in order to identify some morphological parameters; however, size distributions in these cases were not obtained, due to the low contrast and less separation between the particles in these two samples (see Fig.

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