Structural and magnetic properties of the colossal magnetoresistance perovskite

M. Lobanov, A. Balagurov, V. Ju Pomjakushin, P. Fischer, M. Gutmann, A. Abakumov, O. D’yachenko, E. Antipov, O. Lebedev, G. Van Tendeloo

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55 Citations (Scopus)

Abstract

A single phase sample of (Formula presented) with uniform cation distribution and complete oxygen stoichiometry was synthesized by freeze-drying technique and studied by a variety of methods. The sample is ferromagnetic below (Formula presented) with (Formula presented) at 10 K. Precise examination of the crystal structure by a combination of electron diffraction, high-resolution electron microscopy, and neutron powder diffraction revealed a monoclinic distortion of the (Formula presented)type structure (Formula presented) with nonequivalent (Formula presented) layers alternating along the a axis. The crystal structure is characterized by a specific pattern of Mn-O distances implying an unconventional orbital ordering type. A possible relation to charge ordering is described within the bond valence sum framework.

Original languageEnglish
Pages (from-to)8941-8949
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number13
DOIs
Publication statusPublished - 2000
Externally publishedYes

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