Synthesis and high-frequency magnetoelectric characterization of the 0-3 particulate lead-free multiferroic composite KNN/CFO

Author(s)

Gualdi, Alexandre Jose ; Batacline, Leonardo Dos Santos ; Santo, Gustavo Correia Espirito ; Alkathy, Mahmoud S. ; Zabotto, Fabio Luis

• Document type: Journal article
• Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 36, n. 33, p. 7-pg., 2024-08-21.

Abstract

The research for lead-free magnetoelectric (ME) multiferroic composite materials has increased considerably because they are environmentally friendly. For composites with 0-3 connectivity, synthesis with lead-free phase has proven challenging to obtain high values of ME coupling. This work reports the successful synthesis of the KNN/CFO composite (K0.5N0.5NbO3/CoFe2O4) by conventional synthesis process. XRD and SEI showed two well-defined, also presenting good electric polarization values. The ME coefficient was very high, reaching values close to 2850 mV cm-1<middle dot>Oe at the electromechanical resonance frequency. The dipolar interaction between the electric charges and magnetic moments of the KNN and CFO phases was responsible for the high value and the behavior of dependence on the applied magnetic field. (AU)

• FAPESP's process: 19/24603-2 - High-frequency magnetoelectric coupling study in multiferroic composites
• Grantee: Alexandre José Gualdi
• Support Opportunities: Regular Research Grants
• FAPESP's process: 23/05716-6 - Synthesis and Characterization of Ferroelectric and Multiferroic Materials for Applications in Energy Storage and Converters (Mechanical and Photovoltaic)"
• Grantee: Mahmoud Saleh Mohammed Alkathy
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
• FAPESP's process: 17/13769-1 - Multiferroic and ferroelectric materials for energy converters: synthesis, properties, phenomenology and applications
• Grantee: José Antonio Eiras
• Support Opportunities: Research Projects - Thematic Grants