Magnetic phase diagrams and lattice structure of Nd1/2Ca 1/2(Mn1-yMy)O3 (M = Ru, Cr and Sc)

Sheng Xu, Yutaka Moritomo, Akihiko Machida, Kenji Ohoyama, Arao Nakamura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We have derived the magnetic phase diagram for Nd1/2Ca 1/2(Mn1-yMy)O3 (M = Ru, Cr and Sc) based on the neutron powder diffraction measurements. We found that the Ru- and Cr-doping induces an antiferromagnetic-to-ferromagnetic transition at y = 0.01-0.02, while the Sc-doping does not induce the transition up to y = 0.10. We have found significant dopant dependent effects on the distortion of the MnO6 octahedra in the heavily-doped region of the long-c phase: the MnO6 shape approached to the 2-long/4-short type with Ru-doping, while it does to the 4-long/2-short type with Sc-doping. Absence of the ferromagnetic phase in the Sc-doped system can be ascribed to (1) a strong charge-ordering instability due to the 4-long/2-short type distortion of the MnO6 octahedra and (2) the reduced effective one-electron bandwidth due to the Sc3+ (d0) impurities.

Original languageEnglish
Pages (from-to)922-929
Number of pages8
Journaljournal of the physical society of japan
Volume72
Issue number4
DOIs
Publication statusPublished - 2003 Apr 1

Keywords

  • Neutron powder diffraction
  • Perovskite manganites
  • Rietveld structural analysis

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Magnetic phase diagrams and lattice structure of Nd<sub>1/2</sub>Ca <sub>1/2</sub>(Mn<sub>1-y</sub>M<sub>y</sub>)O<sub>3</sub> (M = Ru, Cr and Sc)'. Together they form a unique fingerprint.

Cite this