Improvement of the physical properties of novel (1  y) Co 0.8 Cu + (y) SrTiO 3 nanocomposite 0.2 Fe 2 O 4

Faculty Science Year: 2013
Type of Publication: ZU Hosted Pages:
Authors:
Mohammed Ahmed Abdu Abdullah
Journal: Journal of Materials Research and Technolog ElSevier Volume:
Keywords : Improvement , , physical properties , novel , , , Co 0.8 Cu + (y) SrTiO 3 nanocomposite 0.2 Fe 2 O 4    
Abstract:
Magnetoelectric (ME) nanocomposites (1  y) Co 0.8 Cu 0.2 Fe 2 O 4 + (y) SrTiO (y = 40, 50, 60, 80 and 100%) were prepared by standard ceramic method. Phase formation was checked using X-ray diffraction analysis. Both saturation magnetization (M s ) and Curie temperature (T C 3 ) decrease with increasing SrTiO content. Temperature dependence of the dielectric constant reveals two maxima, one about 550 K corresponds to non-stoichiometry and lattice distortions while the second around 900 K corresponds to the Curie temperature (T ). The large value of ME output is due to the strain induced by lattice distortion in the ferrite phase by Jahn–Teller ions like Cu. Hence, Jahn–Teller effect in the ferrite leads to polarization inthepiezoelectricphase. C 3
    
     
 
       

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