Direct evidence for multiferroic magnetoelectric coupling in 0.9BiFeO3-0.1BaTiO3.
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, atomic level evidence for magnetoelectric coupling of intrinsic multiferroic origin in a BiFeO3-based system.
Singh
Anar
A
School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi -221305, India.
Pandey
Vibhav
V
Kotnala
R K
RK
Pandey
Dhananjai
D