Structural and magnetic properties of layered Sr7Mn4O15

J F Vente, K V Kamenev, D A Sokolov

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The magnetic and structural properties of the layered manganite Sr7Mn4O15 have been studied by powder neutron diffraction and magnetic susceptibility techniques between 5 and 300 K. The structure consists of pairs of face sharing MnO6 octahedra to form Mn2O9 dimers. The description of the crystal structure has been improved by employing a model in which some of the Sr and O ions are statistically distributed over two different sites. Three different magnetic phases can be distinguished in the temperature region studied. Below similar to 75 K, the Mn4+ sublattice is antiferromagnetically ordered with an antiparallel alignment between all nearest-neighbor manganese ions. Between similar to 75 and similar to 150 K extensive quasi two-dimensional magnetic clusters are present. At temperatures above similar to 150 K, one can observe correlations related to intradimer spin pairing. Truly paramagnetic behavior is not observed at any temperature below 300 K.

Original languageEnglish
Pages (from-to)214403
Number of pages10
JournalPhysical review B
Volume64
Issue number21
DOIs
Publication statusPublished - 1 Nov 2001

Keywords / Materials (for Non-textual outputs)

  • RUDDLESDEN-POPPER COMPOUND
  • GIANT MAGNETORESISTANCE
  • COLOSSAL MAGNETORESISTANCE
  • ELECTRONIC-PROPERTIES
  • NEUTRON-DIFFRACTION
  • CRYSTAL
  • MANGANATES
  • CA4MN3O10

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