Ground state properties of the A-site ordered manganites, RBaMn 2O6 (R = La, Pr and Nd)

Tomohiko Nakajima, Hiroshi Kageyama, Hideki Yoshizawa, Kenji Ohoyama, Yutaka Ueda

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

The most significant structural feature of the A-site ordered manganese perovskites, RBaMn2O6, is that the MnO2 square sublattice is sandwiched by two types of rock-salt layers, RO and BaO, with much different sizes and consequently the MnO6 octahedron itself is distorted in a noncetrosymmetric manner. The structures and electromagnetic properties of RBaMn2O6 (R = La, Pr and Nd) have been investigated. They have tetragonal structures with no tilt of MnO6 octahedra and show ferromagnetic metal transitions. The ground state is a coexistence of ferromagnetic metal and antiferromagnetic charge-orbital ordered phases for LaBaMn2O6 and A-type antiferromagnetic metal for PrBaMn2O6 and NdBaMn2O6. These ground state behaviors are explained by the effect of Mn-O distance on the bandwidth and the layer structure with the RO-MnO2-BaO-MnO 2 stacking along the c-axis.

Original languageEnglish
Pages (from-to)3237-3242
Number of pages6
Journaljournal of the physical society of japan
Volume72
Issue number12
DOIs
Publication statusPublished - 2003 Dec 1

Keywords

  • Electronic phase diagram
  • Magnetic ground states
  • Neutron diffraction
  • New metal-ordered manganites RBaMnO
  • Structural and electromagnetic properties

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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