Title :
Microstructure and magnetic properties of cobalt nanocrystals
Author :
Youhui Gao ; Akase, Zentaro ; Shindo, Daisuke ; Yuping Bao ; Krishnan, Kannan
Author_Institution :
Inst. of Multidisciplinary Res. for Adv. Mater., Tohoku Univ., Sendai, Japan
Abstract :
Cobalt nanocrystals are synthesized by rapid pyrolysis of cobalt carbonyl in an inert atmosphere. The size distribution and particle shape of the crystals are controlled by varying the surfactant, its concentration and the reaction temperature. The particles are observed to contain abundant planar defects and their self-assemblies are found to be strongly dependent on their magnetic states. Magnetic order in nanocrystal chains are studied by electron holography.
Keywords :
cobalt; crystal defects; crystal microstructure; crystal structure; electron holography; magnetic particles; nanoparticles; particle size; pyrolysis; self-assembly; surfactants; Co; electron holography; inert atmosphere; magnetic order; magnetic properties; magnetic states; microstructure; nanocrystals; particle shape; planar defects; rapid pyrolysis; reaction temperature; self-assembly; size distribution; surfactant; Atmosphere; Cobalt; Crystal microstructure; Magnetic properties; Nanocrystals; Self-assembly; Shape control; Size control; Temperature control; Temperature distribution;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463769
