A comparative study of the magnetocaloric effect (MCE) is reported in two different types of
chemically synthesized magnetic nanoparticle systems—cobalt ferrite and manganese zinc
ferrite with mean size around 5 and 15nm, respectively. While CoFe2O4 nanoparticles were
synthesized using co-precipitation, the Mn0. 68Zn0. 25Fe2. 07O4 (MZFO) nanoparticles
were prepared by reverse micelle technique using AOT as surfactant. Our results indicate
that the change in entropy with the change in applied magnetic field (dS/dH) is reasonably …

Miniaturization of the electronic devices for space, military and consumer applications
requires cooling devices to be fabricated on a chip for power efficient, noise-free operations.
Refrigeration based on the adiabatic-demagnetization has been used for several decades
for cooling down to sub-kelvin temperatures. Superparamagnetic particles also hold
tremendous potential towards this application. We have studied magnetocaloric effect (MCE)
properties in chemically synthesized ferrite nanoparticles over a broad range in temperature …