Double-layered Aurivillius-type ferroelectrics with magnetic moments

A.B. Missyul, I.A. Zvereva, Thom T.M. Palstra, A.I. Kurbakov

    Research output: Contribution to journalArticleAcademicpeer-review

    21 Citations (Scopus)

    Abstract

    We have synthesized the double-layer Aurivillius phase Bi2LnNbTiO9 where Ln = Nd–Gd, Bi. All compounds adopt the orthorhombic polar space group A21am. The magnetic Ln-ion occupies the cuboctahedral position in the middle of the perovskite double-layer, and thus controls the octahedral tilt of the perovskite block. This tilt modifies the ferroelectric displacement of the (Nb,Ti) towards the octahedral faces. This provides a mechanism to systematically modify the polarization. Mn-substitution on the (Nb,Ti) site for Ln = Bi is homogeneous up to x = 0.2. The magnetic moments of Ln do not order down to 5 K.
    Original languageEnglish
    Pages (from-to)546-550
    Number of pages5
    JournalMaterials research bulletin
    Volume45
    Issue number5
    DOIs
    Publication statusPublished - May 2010

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