Neutron Investigation of Tb1-xCaxMnO3 (x ≥ 0.5)

Akihiko Machida, Yutaka Moritomo, Kenji Ohoyama, Arao Nakamura

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13 Citations (Scopus)

Abstract

Crystal and magnetic structures of Tb1-xCaxMnO3 (x ≥ 0.5) have been investigated by means of neutron powder diffraction experiments. We have derived the magnetic phase diagram against hole concentration x and temperature T: the spin structure changes as CE- → C- → G-type structure with increase of x. In the vicinity of the magnetic phase boundaries, magnetically phase separated state has been observed. At high temperature region, we observe the metallic behavior in a wide x region (0.70 ≤ x ≤ 0.95), and ascribe it to the enhanced one-electron bandwidth W of the eg state.

Original languageEnglish
Pages (from-to)3739-3746
Number of pages8
Journaljournal of the physical society of japan
Volume70
Issue number12
DOIs
Publication statusPublished - 2001 Dec 1

Keywords

  • Magnetic phase diagram
  • Neutron powder diffraction
  • Perovskite-type manganites

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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