Synthesis of Samarium Cobalt Nanoblades

Steele, Darren M.

SLAC National Accelerator Laboratory

关键词: Nanostructures;    43 Particle Accelerators;    Accelerators;    36 Materials Science;    Permanent Magnets;   

DOI  :  10.2172/992930
RP-ID  :  SLAC-TN-10-018
RP-ID  :  AC02-76SF00515
RP-ID  :  992930

美国|英语

来源: UNT Digital Library

【 摘 要 】

As new portable particle acceleration technologies become feasible the need for small high performance permanent magnets becomes critical. With particle accelerating cavities of a few microns, the photonic crystal fiber (PCF) candidate demands magnets of comparable size. To address this need, samarium cobalt (SmCo) nanoblades were attempted to be synthesized using the polyol process. Since it is preferable to have blades of 1-2 {micro}m in length, key parameters affecting size and morphology including method of stirring, reaction temperature, reaction time and addition of hydroxide were examined. Nanoparticles consisting of 70-200 nm spherical clusters with a 3-5 nm polyvinylpyrrolidone (PVP) coating were synthesized at 285 C and found to be ferromagnetic. Nanoblades of 25nm in length were observed at the surface of the nanoclusters and appeared to suggest agglomeration was occurring even with PVP employed. Morphology and size were characterized using a transmission electron microscope (TEM). Powder X-Ray Diffraction (XRD) analysis was conducted to determine composition but no supportive evidence for any particular SmCo phase has yet been observed.