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, Yuji Nagasaka

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)1549-1561
Number of pages13
JournalInternational Journal of Thermophysics
Volume22
Issue number5
Publication statusPublished - 2001

Fingerprint

Metal insulator transition
Superconducting transition temperature
spectral reflectance
Optical properties
transition temperature
insulators
optical properties
Doping (additives)
metals
Hole concentration
Optical constants
emittance
Temperature
Wavelength
temperature dependence
room temperature
wavelengths
temperature

Keywords

  • Kramers-Kronig analysis
  • LaSrMnO
  • Manganese oxide
  • Optical constants
  • Perovskite
  • Spectral reflectance
  • Total hemispherical emittance

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes
  • Physics and Astronomy (miscellaneous)

Cite this

Radiative and optical properties of la1-xSrxMnO3 (0 ≤ x ≤ 0.4) in the vicinity of metal-insulator transition temperatures from 173 to 413 K. / Shimazaki, K.; Tachikawa, S.; Ohnishi, A.; Nagasaka, Yuji.

In: International Journal of Thermophysics, Vol. 22, No. 5, 2001, p. 1549-1561.

Research output: Contribution to journalArticle

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abstract = "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.",
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T1 - Radiative and optical properties of la1-xSrxMnO3 (0 ≤ x ≤ 0.4) in the vicinity of metal-insulator transition temperatures from 173 to 413 K

AU - Shimazaki, K.

AU - Tachikawa, S.

AU - Ohnishi, A.

AU - Nagasaka, Yuji

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

KW - Kramers-Kronig analysis

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