Effect of strong gravitational field on oriented crystalline perovskite-type manganese oxide La1−xSrxMnO3

Makoto Tokuda, Tsutomu Mashimo, Jahirul Islam Khandaker, Yudai Ogata, Yoji Mine, Shinya Hayami, Akira Yoshiasa

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2 Citations (Scopus)

Abstract

We report the effect of a strong gravitational field on oriented crystalline perovskite-type manganese oxide La1−xSrxMnO3 (LSMO). The perovskite-type manganese oxides La1−xSrxMnO3 (LSMO) have been investigated for giant magnetoresistance (GMR) by controlling the hole-doping level (x). A strong gravitational field can change in crystalline state and the enhancement of usual diffusion. We subjected oriented crystalline La1−xSrxMnO3 with different grain and grain-boundary (GBs) Sr concentrations to a strong gravitational field and investigated the resulting changes in the A-site cation diffusion and physical properties of the material. Electron probe micro-analysis (EPMA) results showed appearance of the GBs where the Sr concentration was quite high compared with in other GBs. The quantitative analysis at the grain and GBs indicated that cation diffusion was more enhanced than the annealed one. The temperature dependence of the magnetic susceptibility of the gravity samples changed with the Sr concentration in the grains. The temperature dependence of the resistivity curves of the gravity sample showed several abrupt changes, which corresponded to phase transitions at the grains and GBs, which may be caused by composition changes.

Original languageEnglish
Pages (from-to)7899-7906
Number of pages8
JournalJournal of Materials Science
Volume51
Issue number17
DOIs
Publication statusPublished - 2016 Sep 1
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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