Evidence of new magnetic ordering at high temperatures in Pb-based multiferroics perovskites


Corresponding author: e-mail barbarafraygola@gmail.com, Phone: 055 16 3351 8227, Fax: 0055 3351 9227


Presented here are the results of magnetic data that reveal that both Pb-based perovskites samples, Pb(Fe1/2Nb1/2)O3 (lead iron niobate – PFN) and Pb(Fe2/3W1/3)O3 (lead iron tungstate – PFW), exhibit a change in magnetic ordering from paramagnetic (PM) to weak ferromagnetic state at high temperature: a weak ferromagnetic order occurs in the samples around 530 K. The experimental results suggest a possible involvement of the Pb ions into the superexchange of antiferromagnetic (AFM) phase.