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Evidence of new magnetic ordering at high temperatures in Pb‐based multiferroics perovskites
Author(s) -
Fraygola Barbara,
Nascimento William J.,
Coelho Adelino A.,
Garcia Ducinei,
Eiras Jose A.
Publication year - 2013
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201329011
Subject(s) - superexchange , multiferroics , antiferromagnetism , paramagnetism , ferromagnetism , condensed matter physics , materials science , tungstate , ferroelectricity , physics , metallurgy , optoelectronics , dielectric
Presented here are the results of magnetic data that reveal that both Pb‐based perovskites samples, Pb(Fe 1/2 Nb 1/2 )O 3 (lead iron niobate – PFN) and Pb(Fe 2/3 W 1/3 )O 3 (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.