Title :
A magnetic behavior of α-Fe nanoparticle
Author :
Han, Young Chul ; Kim, Young Hwan ; Heo, Jin Kook ; Kang, Yong Cheol ; Kang, Young Soo
Author_Institution :
Pukyong Nat. Univ., Busan
Abstract :
The alpha-Fe nanoparticle having the high saturation magnetization (Ms) comparable to that of bulk Fe (Ms = 210 emu/g) was synthesized through removing the surfactant coated on the nanoparticle by solventless thermal decomposition method.[1] To synthesized alpha-Fe nanoparticles, the Fe2+-oleat2 ligand complex was annealed at 400 t using the pyrex tube under 10-2 torr for 2 hrs. Prepared nanoparticle were reduced to alpha-Fe crystal structure at 700degC under Ar+H2 gas atmosphere with NaCl powder, and then prepared alpha-Fe nanoparticles were annealed again under high vacuum system at 10-5 torr at 700degC for 3 hrs to remove the coated surfactants. The magnetic properties of the prepared alpha-Fe nanoparticle were characterized by vibrating sample magnetometer (VSM). By X-ray diffraction (XRD), the crystallinity and structure of alpha-Fe nanoparticle was investigated. The size and shape of nanoparticles was checked by TEM.
Keywords :
X-ray diffraction; iron; magnetic annealing; magnetic particles; magnetisation; magnetometers; nanoparticles; pyrolysis; sodium compounds; transmission electron microscopy; Fe; Fe - Element; NaCl; NaCl - Binary; TEM; X-ray diffraction; annealing; coated surfactants; crystal structure; crystallinity; high saturation magnetization; high vacuum system; ligand complex; magnetic behavior; magnetic properties; nanoparflcle; powder; pressure 0.00001 torr; pressure 0.01 torr; pyrex tube; solventless thermal decomposition; temperature 700 C; time 2 hour; time 3 hour; vibrating sample magnetometer; Annealing; Atmosphere; Iron; Magnetic properties; Magnetometers; Nanoparticles; Powders; Saturation magnetization; Thermal decomposition; Vacuum systems; αFe nanoparticle; saturation magnetization; thermal decomposition;
Conference_Titel :
Nanotechnology Materials and Devices Conference, 2006. NMDC 2006. IEEE
Conference_Location :
Gyeongju
Print_ISBN :
978-1-4244-0541-1
Electronic_ISBN :
978-1-4244-0541-1
DOI :
10.1109/NMDC.2006.4388946
