Radiative and optical properties of la1-xSrxMnO3 (0 ≤ x ≤ 0.4) in the vicinity of metal-insulator transition temperatures from 173 to 413 K

K. Shimazaki, S. Tachikawa, A. Ohnishi, Y. Nagasaka

研究成果: Article査読

46 被引用数 (Scopus)

抄録

Radiative and optical properties of polycrystalline La1-xSrxMnO3 (0≤ x ≤ 0.4) in the vicinity of the metal-insulator transition are presented. The temperature dependence of the total hemispherical emittance εH of La1-xSrxMnO3 was measured by the calorimetric method in the temperature range from 173 to 413 K. It was confirmed that εH showed unexpected variation as a result of changes in the hole concentration (x). Especially in the case of La0.825Sr0.175MnO3, εH remains high above the transition temperature TC due to insulator-like behavior; on the other hand, it decreases sharply below TC because of metallic behavior. The spectral reflectance was measured by FT-IR in the wavelength range of 0.25 to 100 μm at room temperature. The optical constants were calculated by Kramers-Kronig analysis of the spectral reflectance data. An insulator-like character of the optical properties appears at lower Sr2+ doping levels while a metallic one exists at higher Sr2+ doping levels.

本文言語English
ページ(範囲)1549-1561
ページ数13
ジャーナルInternational Journal of Thermophysics
22
5
DOI
出版ステータスPublished - 2001 1 1

ASJC Scopus subject areas

  • Condensed Matter Physics

フィンガープリント 「Radiative and optical properties of la<sub>1-x</sub>Sr<sub>x</sub>MnO<sub>3</sub> (0 ≤ x ≤ 0.4) in the vicinity of metal-insulator transition temperatures from 173 to 413 K」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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