Preparation of (La1 − xSrx)MnO3 − δ thin films on Si (100) substrates by a metal-organic decomposition method for smart radiation devices

Tadashi Shiota, Yuko Mori, Jun Sugiyama, Osamu Sakurai, Akio Nishiyama, Naoki Wakiya, Sumitaka Tachikawa, Kazuo Shinozaki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

(La1 − xSrx)MnO3 − δ (LSMO) thin films were prepared on Si(100) substrates using a metal-organic decomposition (MOD) technique for smart radiation devices used for thermal control in spacecraft. The 6 wt% concentration MOD precursor solutions were spin-coated on Si substrates. The coated films were dried at 90 °C and pyrolytically decomposed at 530 °C. Finally, they were annealed in air at 750 °C to obtain dense, polycrystalline, and single-phase perovskite LSMO films. A ferromagnetic-paramagnetic phase transition was observed close to room temperature in a LSMO film. The thermal emittance of the film was changed as a result of this phase transition. The phase transition temperature increased with an increasing Sr ratio at the A-site of the LSMO and decreased after annealing under a reduced atmosphere. Based on this result, we propose that the temperature range where the thermal emittance is widely variable can be finely tuned on demand with post-annealing.

Original languageEnglish
Pages (from-to)154-158
Number of pages5
JournalThin Solid Films
Volume626
DOIs
Publication statusPublished - Mar 31 2017
Externally publishedYes

Keywords

  • Lanthanum strontium manganite
  • Metal-organic decomposition
  • Oxygen deficiency
  • Si substrate
  • Smart radiation device
  • Thermochromic film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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