Oxygen-dependent transport properties in La0.7Ba0.3MnO3-δ thin films for uncooled infrared bolometric materials

Ken Ichi Hayashi, Eiji Ohta, Hideo Wada

研究成果: Conference article査読

抄録

La0.7Ba0.3MnO3-δ (LBMO) has been noticed as a potential candidate for an uncooled infrared bolometer material, which has a large temperature dependent electrical resistance, as a potential candidate for an uncooled infrared bolometer material. The LBMO thin films were deposited on SrTiO3 (100) substrates by a laser ablation method. The films were characterized by an x-ray diffractometer. In the observation by an atomic force microscope, the size of the crystal grains and the number of grain boundaries on the films were extremely sensitive on the ambient oxygen pressure during the deposition. The grain size found to have an effect on both the magnitude of the resistivity and the temperature dependence of resistivity. The films deposited under the oxygen pressures of 53.3∼80.0Pa, having the temperature dependence of resistivity like a bulk, and it showed a large temperature coefficient of resistance (TCR: defined as 1/R dR/dT) over 3%/K near room temperature.

本文言語English
ページ(範囲)160-167
ページ数8
ジャーナルProceedings of SPIE - The International Society for Optical Engineering
4454
DOI
出版ステータスPublished - 2001 12月 1
イベントMaterials for Infrared Detectors - San Diego, CA, United States
継続期間: 2001 7月 302001 8月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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