Spin state transition: The origin of structural, magnetic and metal-insulator transitions in GdBaCo<inf>2</inf>O<inf>5+δ</inf> (δ≈0.5)

C. Frontera, J. L. Garcı́a-Muñoz, A. Llobet, M. A.G. Aranda, J. Rodrı́guez-Carvajal, M. Respaud, J. M. Broto, B. Raquet, H. Rakoto, M. Goiran

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    12 Citations (Scopus)

    Abstract

    The metal-insulator transition in GdBaCo2O5.5 at TMI≈360 K has been investigated by synchrotron X-ray powder diffraction and magnetic measurements. We have found that, at TMI remarkable structural distortions and magnetic changes take place. These changes evidence a spin state transition of Co ions at this temperature that is the origin of the metal-insulator transition. © 2002 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)751-753
    JournalJournal of Magnetism and Magnetic Materials
    Volume242-245
    DOIs
    Publication statusPublished - 1 Jan 2002

    Keywords

    • Correlated electron system
    • Perovskite structure
    • Phase transitions - metal-insulator

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