Effect of Mn substitution on magnetoelectric properties of bismuth ferrite system

The effect of Mn substitution on ferroelectric and antiferromagnetic properties of the Bi0.9La0.1Fe1-xMnxO3 system has been studied. It is seen that, with the increase in Mn content, there is a contraction in unit cell volume. Since the cell volume contraction is isotropic, lattice distortion (c/a) remains the same and so is the ferroelectric transition temperature T-C. Further, it is observed that the presence of Mn does not affect the loss tangent (tan delta) of the samples. On the contrary, with increase in Mn content, a small but linear enhancement in the magnetization is observed. (C) 2003 American Institute of Physics.