Exchange bias effect in nickel zinc ferrite–mesoporous silica nanocomposites

Journal of Magnetism and Magnetic Materials, Volume 332, April 2013, Pages 98-102.
Shilpi Banerjee, Partha Hajra, Mykanth Reddy Mada, Asim Bhaumik, Sri Bandyopadhyay, Dipankar Chakravorty.

 

MLS Professor’s Unit, Indian Association for the Cultivation of Science, Kolkata 700032, India and

Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India and

School of Materials Science and Engineering, University of New South Wales, Kensington, Sydney-2052, Australia.

 

 

Abstract

 

Nickel zinc ferrite–mesoporous silica nanocomposite (NZF–MS) was synthesized using impregnation method. The microstructure was investigated by transmission electron microscopy. A magnetic exchange bias effect was exhibited by the nanocomposites. This was ascribed to the presence of a ferromagnetic core and antiferromagnetic shell structure. Electron microscopic studies confirmed the presence of a core–shell structure with NZF forming the core. The zero-field cooled magnetization data as a function of temperature indicated the presence of an antiferromagnetic phase which is believed to be formed by the diffusion of Fe3+or Ni2+ ions into the silica glass.

 

 

Go To Journal

 

Check Also

Advancing Fusion Energy: High-Field REBCO Superconducting Magnets in the SPARC TFMC Program - Advances in Engineering

Advancing Fusion Energy: High-Field REBCO Superconducting Magnets in the SPARC TFMC Program