B-site deficiencies in A-site-ordered perovskite LaCu3Pt 3.75O12

Mikiko Ochi, Ikuya Yamada, Kenya Ohgushi, Yoshihiro Kusano, Masaichiro Mizumaki, Ryoji Takahashi, Shunsuke Yagi, Norimasa Nishiyama, Toru Inoue, Tetsuo Irifune

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

An A-site-ordered perovskite LaCu3Pt3.75O 12 was synthesized by replacing Ca2+ with La3+ in a cubic quadruple AA′3B4O12-type perovskite CaCu3Pt4O12 under high-pressure and high-temperature of 15 GPa and 1100 C. In LaCu3Pt 3.75O12, 1/16 of B-site cations are vacant to achieve charge balance. The B-site deficiencies were evidenced by crystal structure refinement using synchrotron X-ray powder diffraction, hard X-ray photoemission spectroscopy, and soft X-ray absorption spectroscopy, leading to the ionic model La3+Cu2+3Pt4+3.75O 2-12. Magnetic susceptibility data for this compound indicated a spin-glass-like behavior below Tg = 3.7 K, which is attributed to disturbance of the antiferromagnetic superexchange interaction by the B-site deficiencies.

Original languageEnglish
Pages (from-to)3985-3989
Number of pages5
JournalInorganic chemistry
Volume52
Issue number7
DOIs
Publication statusPublished - 2013 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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