Physical properties of oxygen composition controlled La 1-xSrxMnOy single crystals

Yuui Yokota, Jun Ichi Shimoyama, Tetsuro Ogata, Shigeru Horii, Kohji Kishio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have investigated the effect of high-temperature post-annealing and control of excess oxygen for La1-xSrxMnOy (0.05 ≤ × ≤ 0.2) single crystals. Thin plate-like single crystals prepared by careful cutting and polishing enabled the control of excess oxygen for the single crystals by post-annealing for relatively short times at various temperatures. Post-annealed crystals with y ∼ 3.00 exhibited higher T C than as-grown crystals due to a homogenization of cation and oxygen compositions and reduction of local lattice strains. With an increase of y, TC systematically increased for all Sr compositions. Competition between an increase of mean valence of manganese and a generation of cation vacancies determines the TC of La1-xSrxMnO y crystals.

Original languageEnglish
Title of host publicationSolid-State Chemistry of Inorganic Materials VI
Pages92-96
Number of pages5
Publication statusPublished - 2006 Dec 1
Externally publishedYes
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: 2006 Nov 272006 Nov 29

Publication series

NameMaterials Research Society Symposium Proceedings
Volume988
ISSN (Print)0272-9172

Other

Other2006 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period06/11/2706/11/29

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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