Chemical synthesis of Shape- and size-controlled FePt and SmCo5 nanoparticles for application in magnetic recording

• Grant number: 13/08658-5
• Support type: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): August 01, 2013
• Effective date (End): February 28, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal researcher: Laudemir Carlos Varanda
• Grantee: Tiago Luis da Silva
• Supervisor abroad: Shouheng Sun
• Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Research place: Brown University, United States
• Associated to the scholarship: 11/06556-5 - Synthesis and self-assembling of metallic ferromagnetic nanoparticles for ultrahigh density magnetic recording and high-performance permanent magnets applications., BP.DR

Abstract

Recently, ferromagnetic FePt and SmCo5 nanoparticles have been received much attention as potential application in ultra-high magnetic recording. Spherical FePt nanoparticles were firstly obtained by Sun and co-workers by using a polyol process and, since then, various synthetics methods has been developed aiming improvement of size and shape control of nanoparticles, obtaining nanocubes, nanorods and nanowires. One-dimensional FePt nanoparticles were obtained by Sun and co-workers aiming to avoids the limit resulting from magnetic misalignment presented by spherical NP. Sun and co-workers also developed chemical syntheses in which ferromagnetic spherical nanoparticles and nanocomposites of SmCo5 were obtained. However, few efforts have been made to develop a improved chemical synthesis to obtained size- and shape-controlled ferromagnetic FePt and SmCo5 nanoparticles, revealing a broad field and challenging yet to be explored. Thus, this project, which is linked to the regular PhD project (FAPESP grants No. 2011/06556-5), proposes to continue the work begun by Professor Shouheng Sun through the exploration and development of synthetics routes to obtain size- and shape- controlled FePt and SmCo5 nanoparticles for application in ultra-high magnetic recording. (AU)