Influence of preparation method on structural and magnetic properties of nickel ferrite nanoparticles

Bulletin of materials science

R P Pant²  E M Mohammed¹  Ashok Kumar²  Sukhvir Singh²  Binu P Jacob³ 

[1] Department of Physics, Maharaja’s College, Ernakulam 681 011, India$$National Physical Laboratory, New Delhi 110 012, India$$Department of Physics, Maharaja’s College, Ernakulam 681 011, IndiaDepartment of Physics, Maharaja’s College, Ernakulam 681 011, India$$National Physical Laboratory, New Delhi 110 012, India$$National Physical Laboratory, New Delhi 110 012, IndiaDepartment of Physics, Maharaja’s College, Ernakulam 681 011, India$$National Physical Laboratory, New Delhi 110 012, India$$;National Physical Laboratory, New Delhi 110 012, India$$National Physical Laboratory, New Delhi 110 012, IndiaNational Physical Laboratory, New Delhi 110 012, India$$;Department of Physics, Maharaja’s College, Ernakulam 681 011, India$$Department of Physics, Maharaja’s College, Ernakulam 681 011, IndiaDepartment of Physics, Maharaja’s College, Ernakulam 681 011, India$$

关键词: Nickel ferrite;    solâ€�?�gel technique;    co-precipitation;    superparamagnetism.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Nickel ferrite nanoparticles of very small size were prepared by sol�?�gel combustion and co-precipitation techniques. At the same annealing temperature sol�?�gel derived particles had bigger crystallite size. In both methods, crystallite size of the particles increased with annealing temperature. Sol�?�gel derived nickel ferrite particles were found to be of almost spherical shape and moderate particle size with a narrow size distribution; while co-precipitation derived particles had irregular shape and very small particle size with a wide size distribution. Nickel ferrite particles produced by sol�?�gel method exhibited more purity. Sol�?�gel synthesized nanoparticles were found to be of high saturation magnetization and hysteresis. Co-precipitation derived nickel ferrite particles, annealed at 400°C exhibited superparamagnetic nature with small saturation magnetization. Saturation magnetization increased with annealing temperature in both the methods. At the annealing temperature of 600°C, co-precipitation derived particles also became ferrimagnetic.

【 授权许可】

Unknown