Structural transformation and magnetoelectric behaviour in Bi1−xGdxFeO3 multiferroics
Аннотации
The crystal structure, dielectric, magnetic and magnetoelectric (ME) properties of
Bi1−xGdxFeO3 (BGFO, x = 0, 0.05, 0.1, 0.15, 0.2) multiferroic ceramics have been studied.
The substitution of bismuth by gadolinium induces a R3c → Pnma phase structural transition
at x>0.1, which leads to the suppression of the spiral modulated spin structure and develops
weak ferromagnetic properties in the BiFeO3-based materials. Through studying the
temperature/magnetic field dependence of the ME coefficient, we have revealed the effect of
the substitution of Gd3+ ions on the ME properties, and have demonstrated the possibility of
manipulating the electric state in BGFO multiferroics by applying magnetic field at room
temperature.