Title :
Large coercivity in Mn3O4 nanocrystallites
Author :
Si, P.Z. ; Bruck, E. ; Zhang, Z.D. ; Choi, C.J. ; Zhang, W.S. ; Tegus, O. ; Buschow, K.H.J.
Author_Institution :
Inst. of Metal Res., Chinese Acad. of Sci., Shenyang, China
Abstract :
Heat treatment was applied to Mn nanoparticles to introduce Mn3O4 nanocrystals into the sample. X-ray diffraction spectra and the temperature dependence of the magnetization and coercivity of the Mn nanoparticles were studied. A large coercivity was observed in manganese nanocomposites containing Mn3O4 crystals. This coercivity, which was found to decrease almost linearly with increasing temperature, is mainly due to the small crystallite size of the ferrimagnetic Mn3O4.
Keywords :
X-ray diffraction; coercive force; ferrimagnetic materials; heat treatment; magnetic particles; manganese compounds; nanocomposites; nanoparticles; Mn3O4; X-ray diffraction spectra; coercivity; crystallite size; ferrimagnetic nanocrystals; heat treatment; magnetization; manganese nanocomposites; nanocrystallites; nanoparticles; Coercive force; Crystallization; Heat treatment; Magnetization; Manganese; Nanocomposites; Nanocrystals; Nanoparticles; Temperature dependence; X-ray diffraction;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464080
