Relation between crystal and magnetic structures of layered manganite La2-2cursive greek chiSr1+2cursive greek chiMn2O7 (0.30 ≤ cursive greek chi ≤ 0.50)

Masato Kubota, Hirofumi Fujioka, Kazuma Hirota, Kenji Ohoyama, Yutaka Moritomo, Hideki Yoshizawa, Yasuo Endoh

Research output: Contribution to journalArticlepeer-review

135 Citations (Scopus)

Abstract

The magnetic phase diagram of La2-2cursive Greek chiSr1+2cursive Greek chiMn2O7 (0.30 ≤ cursive Greek chi ≤ 0.50) was reexamined from the point of view of the crystal structure, particularly the Jahn-Teller (JT) distortion ΔJT of Mn-O6 octahedra, i.e., the ratio of the averaged apical Mn-O bond length to the equatorial Mn-O bond length. We have found that ΔJT decreases with increasing hole concentration cursive Greek chi, while the canting angle between neighboring planes continuously increases from 0° (planar ferromagnet: 0.32 ≤ cursive Greek chi ≤ 0.38) to 180° (A-type antiferromagnet (AFM): cursive Greek chi = 0.48). The dominance of the A-type AFM structure with the decrease of ΔJT can be ascribed to the change in the eg orbital state from d3z2-cursive Greek chi2 to dcursive Greek chi2-y2.

Original languageEnglish
Pages (from-to)1606-1609
Number of pages4
Journaljournal of the physical society of japan
Volume69
Issue number6
DOIs
Publication statusPublished - 2000 Jun

Keywords

  • Colossal magnetoresistance (CMR)
  • Double-layered manganite
  • Jahn-Teller distortion
  • Low dimensionality
  • Magnetic phase diagram
  • Powder neutron diffraction
  • e orbital state

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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