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V. Corral-Flores, D. Bueno-Baqués, A. Glushchenko, R. Ziolo, J. Matutes-Aquino, R. Sato Turtelli, R. Grössinger:
"Magnetic Properties of Spinel Cobalt-Manganese Ferrites Magnetic Properties of Spinel Cobalt-Manganese Ferrites";
IEEE Transactions on Magnetics, PP (2014), 89.

Cobalt ferrite (CoFe2O4) and manganese substituted cobalt ferrite (Co0,25Mn0,75Fe2O4) were synthesized by co-precipitation and sol-gel methods. X-ray diffraction revealed that manganese ions slightly enlarged the crystal lattice with respect to pure cobalt ferrite. Magnetization, linear magnetostriction and piezomagnetic coefficient values tended to decrease with the ion substitution. Linear magnetostriction dropped from a value of -111.5 ppm for cobalt ferrite to values of -22.6 ppm and -30.6 ppm for the substituted samples obtained from co-precipitation and sol-gel, respectively. The sample prepared by sol-gel technique resulted in a higher magnetization, magnetostriction and piezomagnetic coefficient than that synthesized by co-precipitation method.

http://dx.doi.org/10.1109/TMAG.2014.2357172