Structure, magnetism and transport of the perovskite manganites Ln 0.5Ca0.5MnO3 (Ln=Ho, Er, Tm, Yb and Lu)

Kenji Yoshii, Hideki Abe, Naoshi Ikeda

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

It was found that the manganese perovskite oxides Ln0.5Ca 0.5MnO3 (Ln=Ho, Er, Tm, Yb and Lu) have an orthorhombic structure (space group Pnma). The Mn-O-Mn angles were calculated to be ∼148-150°, revealing an existence of a large crystallographic distortion in these oxides. Electrical resistivity measurements indicated both an insulating nature and a small magnetoresistance effect, both of which are owing to narrow bandwidths of the Mn-3d electrons arising from the crystallographic distortion. DC magnetization measurements showed the three characteristic temperatures, which could be assigned to charge-order, antiferromagnetism of Mn moments, and possible glassy states. All of these temperatures were decreased for the heavier Ln ions, which is explained in connection with both a difference of ionic radii of Ln3+ and Ca2+, and a lowering of electron transfer. The charge-ordering transition was not clearly observed only for Lu0.5Ca0.5MnO3 containing the smallest lanthanide ion, plausibly due to a large randomness of magnetic interactions arising from the ionic radii difference of Lu3+ and Ca2+. In addition, preliminary measurements of AC dielectric response suggested that these manganites belong to a so-called multiferroic system.

Original languageEnglish
Pages (from-to)3615-3623
Number of pages9
JournalJournal of Solid State Chemistry
Volume178
Issue number12
DOIs
Publication statusPublished - Dec 2005
Externally publishedYes

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Manganites
Magnetism
Perovskite
Oxides
Antiferromagnetism
Lanthanoid Series Elements
radii
Electrons
manganese oxides
antiferromagnetism
Magnetoresistance
Manganese
Electron transitions
Rare earth elements
Heavy ions
Magnetization
alternating current
heavy ions
electron transfer
direct current

Keywords

  • Antiferromagnetism
  • Charge order
  • Magnetoresistance
  • Manganite
  • Perovskite

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Structure, magnetism and transport of the perovskite manganites Ln 0.5Ca0.5MnO3 (Ln=Ho, Er, Tm, Yb and Lu). / Yoshii, Kenji; Abe, Hideki; Ikeda, Naoshi.

In: Journal of Solid State Chemistry, Vol. 178, No. 12, 12.2005, p. 3615-3623.

Research output: Contribution to journalArticle

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