Observation of abnormal magnetoelectric behavior in 0-3 type CoFe2O4–BaTiO3 nanocomposites

• Published in: Chemical physics letters Vol. 618; pp. 72 - 77
• Main Authors: Wang, W.P., Yang, H., Xian, T., Yu, R.C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 02.01.2015
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2014.10.068

•0-3 type xCoFe2O4/(1−x)BaTiO3 composites were prepared.•The composites exhibit abnormal magnetic field-dependent ME behaviors.•The ME response with x≤0.4 undergoes a minor change upon the dc magnetic field.•The ME response exhibits a staircase-like dependence on the dc field when x=0.5.•A possible mechanism was proposed to explain the field-dependent ME behaviors. Herein we report an example of xCoFe2O4/(1−x)BaTiO3 composites formed in 0-3 type structure, which exhibit abnormal magnetic field-dependent magnetoelectric behaviors different from those reported previously. The magnetoelectric response of the composites with x≤0.4 is found to undergo a minor change upon the dc bias magnetic field. However, when the BaTiO3 content is decreased to the extent x=0.5, the magnetoelectric response exhibits a staircase-like dependence on the dc magnetic field with a sudden decrease at around 2.5kOe. We propose another possible mechanism to explain the field-dependent magnetoelectric behaviors of our CoFe2O4/BaTiO3 composites.