摘要
Mn Fe2O4nanoparticles were synthesized by thermal decomposition of a metal–organic salt in organic solvent with a high boiling point.Some nanoparticles exhibited the triangular shape which has not been observed before as far as we know,while some nanoparticles formed the aggregates with different sizes and shapes.The strength of interparticle dipolar interaction was changed by diluting Mn Fe2O4nanoparticles in the SiO2 matrix with different concentrations.The strong dipolar interaction has been suggested to enhance the blocking temperature（TB）and suppress the remanence（Mr）to saturation（Ms）magnetization ratio（Mr/Ms）for the spherical-like cobalt ferrite nanoparticles in many previous reports.However,Mr/Msand TBof Mn Fe2O4 nanoparticles reported herein mainly depend on the size and shape of the nanoparticles and their aggregates.
Mn Fe2O4nanoparticles were synthesized by thermal decomposition of a metal–organic salt in organic solvent with a high boiling point.Some nanoparticles exhibited the triangular shape which has not been observed before as far as we know,while some nanoparticles formed the aggregates with different sizes and shapes.The strength of interparticle dipolar interaction was changed by diluting Mn Fe2O4nanoparticles in the SiO2 matrix with different concentrations.The strong dipolar interaction has been suggested to enhance the blocking temperature（TB）and suppress the remanence（Mr）to saturation（Ms）magnetization ratio（Mr/Ms）for the spherical-like cobalt ferrite nanoparticles in many previous reports.However,Mr/Msand TBof Mn Fe2O4 nanoparticles reported herein mainly depend on the size and shape of the nanoparticles and their aggregates.
基金
supported by the National Natural Science Foundation of China (Grant Nos.51471001,11174004 and 11304001)
