A- and B-Site Solubilities of Trivalent Rare-Earth Cations and B-Site Cation Ordering in Lead Magnesium Niobate

摘要

The solubility limits of trivalent rare-earth cations of widely different ionic radii on the A and B sites of lead magnesium niobate (PMN) have been determined. The yttrium, magnesium, and niobium cations in yttrium-doped PMN have been shown to be 1 : 1 ordered on the B site. The ordering has been studied using computer modeling, both with and without allowance for Pb vacancies on the A site. The dielectric properties of the trivalently doped PMN ceramics have been investigated.