Details of Magnetic Properties in Pb(Fe_{1/2}Nb_{1/2})O_{3}

Abstract

For Pb(Fe0.5Nb0.5)O3 the χ(T ) and m(H) measurements up to 70 kOe were performed with the aim to estimate the antiferromagnetic (AFM) and superantiferromagnetic (SAF) contribution to χ(T ). Below TN the increase of χ(T ) is attributed to a small part of Fe 3+ ions in the SAF clusters. For high elds the suppression of the AFM and enhancement of the SAF susceptibility was observed. An inection point of the m(H) curves below the Néel point suggests the presence of a spin reorientation process connected with the AFM phase.