Direct Evidence for Multiferroic Magnetoelectric Coupling in 0.9BiFeO3-0.1BaTiO3

TL;DR

This study provides direct, unambiguous evidence of intrinsic multiferroic magnetoelectric coupling in a BiFeO3-based system through comprehensive magnetic, dielectric, calorimetric, and structural analyses.

Contribution

It demonstrates the first clear evidence of intrinsic multiferroic magnetoelectric coupling in 0.9BiFeO3-0.1BaTiO3, highlighting structural and polarization changes at the magnetic transition.

Findings

Strong magnetoelectric coupling observed

Significant structural changes at magnetic transition

Polarization scales linearly with magnetization

Abstract

Magnetic, dielectric and calorimetric studies on 0.9BiFeO3-0.1BaTiO3 indicate strong magnetoelectric coupling. XRD studies reveal a very remarkable change in the rhombohedral distortion angle and a significant shift in the atomic positions at the magnetic Tc due to an isostructural phase transition. The calculated polarization using Rietveld refined atomic positions scales linearly with magnetization. Our results provide the first unambiguous evidence for magnetoelectric coupling of intrinsic multiferroic origin in a BiFeO3 based system.