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Journal of Materials Science

, Volume 51, Issue 17, pp 7899–7906 | Cite as

Effect of strong gravitational field on oriented crystalline perovskite-type manganese oxide La1−x Sr x MnO3

  • Makoto Tokuda
  • Tsutomu Mashimo
  • Jahirul Islam Khandaker
  • Yudai Ogata
  • Yoji Mine
  • Shinya Hayami
  • Akira Yoshiasa
Original Paper

Abstract

We report the effect of a strong gravitational field on oriented crystalline perovskite-type manganese oxide La1−x Sr x MnO3 (LSMO). The perovskite-type manganese oxides La1−x Sr x MnO3 (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−x Sr x MnO3 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.

Keywords

Resistivity Curve Cation Diffusion Susceptibility Curve Strong Gravitational Field Gravity Experiment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors would like to thank T. Matsui, graduated school of Science and Technology Kumamoto University, for providing us details of techniques about measurement of the temperature dependence of resistivity.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Makoto Tokuda
    • 1
  • Tsutomu Mashimo
    • 1
  • Jahirul Islam Khandaker
    • 1
  • Yudai Ogata
    • 2
  • Yoji Mine
    • 3
  • Shinya Hayami
    • 4
  • Akira Yoshiasa
    • 4
  1. 1.Institute of Pulsed Power ScienceKumamoto UniversityKumamotoJapan
  2. 2.Advanced Science Research Center, Japan Atomic Energy AgencyTokaiJapan
  3. 3.Faculty of EngineeringKumamoto UniversityKumamotoJapan
  4. 4.Faculty of ScienceKumamoto UniversityKumamotoJapan

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