Can I read Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone on EtoBox?

Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone by Mu-Pei Chen; Kazuya Kuroishi; Yoshitaka Kitamoto is a Engineering article available to read on EtoBox.

What is Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone about?

Fe-Pt nanoparticles of 3.5 nm in average particle diameter are obtained with the simultaneous chemical reduction of platinum acetylacetonate and the thermal decomposition of iron pentacarbonyl. Because the as-synthesized particles are superparamagnetic at room temperature, they must be transformed to L1 0 ordered phase by annealing at temperatures above 773 K to apply to high-density magnetic recording media. However, the annealing at such high temperatures induces the coalescence and inter-particle sintering. In the present paper, to solve the problem caused by the annealing, we use ultraviolet-ozone treatment to modify particle surface. Even after annealing at 773 K, the crystalline size is kept at 4.4 nm. Furthermore, coercivity is higher than that without the ultraviolet-ozone treatment.

Who reads Surface treatment of ferromagnetic nanoparticle-assembly by UV irradiation with ozone?

Author

Mu-Pei Chen; Kazuya Kuroishi; Yoshitaka Kitamoto

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0013-4686)

Published

2005

Language

EN

Field

Engineering (Physical Sciences)