TY - JOUR
T1 - Sonochemical synthesis, structural and magnetic properties of air-stable Fe/Co alloy nanoparticles
AU - Li, Qiaoling
AU - Li, Hongliang
AU - Pol, V. G.
AU - Bruckental, Ishai
AU - Koltypin, Yuri
AU - Calderon-Moreno, J.
AU - Nowik, Israel
AU - Gedanken, Aharon
PY - 2003/8/1
Y1 - 2003/8/1
N2 - Nanoparticles of the Fe/Co alloy have been prepared by sonolysis of a Fe(CO)5 and Co(NO)(CO)3 mixture in diphenylmethane solution under argon. The as-prepared product is an amorphous material having 10 nm diameter particles. Upon annealing in argon at 600 °C for 5 h, an air-stable Fe/Co alloy is formed with an increased particle size to ∼40 nm. The Fe/Co alloy nanoparticles have been characterized by XRD, TEM, TGA, DSC, XPS, EPR, MES and magnetic susceptibility measurements. Materials obtained under appropriate conditions possess a very high saturation magnetization of about 150-238 emu g-1 and good, soft magnetic properties (H c = 70 - 30 G). The nanocrystalline particles have a core-shell structure in which the iron-cobalt core is surrounded by a carbon surface layer. The stability of the nanocrystalline particle has been discussed, based on the core-shell structure.
AB - Nanoparticles of the Fe/Co alloy have been prepared by sonolysis of a Fe(CO)5 and Co(NO)(CO)3 mixture in diphenylmethane solution under argon. The as-prepared product is an amorphous material having 10 nm diameter particles. Upon annealing in argon at 600 °C for 5 h, an air-stable Fe/Co alloy is formed with an increased particle size to ∼40 nm. The Fe/Co alloy nanoparticles have been characterized by XRD, TEM, TGA, DSC, XPS, EPR, MES and magnetic susceptibility measurements. Materials obtained under appropriate conditions possess a very high saturation magnetization of about 150-238 emu g-1 and good, soft magnetic properties (H c = 70 - 30 G). The nanocrystalline particles have a core-shell structure in which the iron-cobalt core is surrounded by a carbon surface layer. The stability of the nanocrystalline particle has been discussed, based on the core-shell structure.
UR - http://www.scopus.com/inward/record.url?scp=0042327955&partnerID=8YFLogxK
U2 - 10.1039/b302136j
DO - 10.1039/b302136j
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AN - SCOPUS:0042327955
SN - 1144-0546
VL - 27
SP - 1194
EP - 1199
JO - New Journal of Chemistry
JF - New Journal of Chemistry
IS - 8
ER -