Abstract
Bi-magnetic materials possess unique magnetic characteristics combining hysteretic and built-in responses for self-bias magnetoelectric applications. In this work, two bi-magnetic clusters of Co/MFe2O4 (M=Co and Zn) were hydrothermally synthesized for relative comparison of magnetic characteristics between ferromagnetic/ferrimagnetic (Co/CoFe2O4) and ferromagnetic/antiferromagnetic (Co/ZnFe2O4) complexes. Both bi-magnetic clusters were found to exhibit clear two-phases with random morphology and average cluster size of 110nm via physical complexation. Magnetic characteristics of the Co/CoFe2O4 and Co/ZnFe2O4 illustrated M–H slope of 0.02emu/gOe at Hdc=0Oe with different remanent magnetization of 15.16emu/g and 0.22emu/g, respectively. As a magnetostritive phase in the magnetoelectric composites, two bi-magnetic clusters were formed with uniform cluster size for effective strain transfer between magnetostrictive-piezoelectric phases in the magnetoelectric system.
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