Cite as:
Shimazaki K, Tachikawa S, Ohnishi A, Nagasaka Y, 2001, "Temperature dependence of total hemispherical emittance in perovskite-type manganese oxides, La_1-xSr_xMnO₃" High Temperatures - High Pressures 33(5) 525 – 531

Temperature dependence of total hemispherical emittance in perovskite-type manganese oxides, La_1-xSr_xMnO₃

Kazunori Shimazaki, Sumitaka Tachikawa, Akira Ohnishi, Yuji Nagasaka

Received 05 April 2000

Abstract. La_1-xSr_xMnO₃ is a manganese oxide with a perovskite-type structure, LaMnO₃, by substitution of La³⁺ sites with Sr²⁺, which shows a variety of phenomena with changing hole concentration (x). The total hemispherical emittance, ε_H, of La_1-xSr_xMnO₃ (x = 0, 0.175, and 0.3) in the vicinity of the metal - insulator transition temperature was measured by the calorimetric method in the temperature range 173 - 373 K. Remarkable differences in ε_H resulted with changing hole concentration (x). It was observed that ε_H of La_0.825Sr_0.175MnO₃ changed notably at about 280 K accompanied by the metal - insulator transition and the maximum amount of variation in ε_H was 0.42. The effects of surface conditions and thicknesses of samples were also observed. The uncertainty in the measurement of ε_H was estimated to be at most ±2.2% from 173.15 to 373.15 K.

Restricted material:

 Full-text PDF size: 147 Kb

Your computer (IP address: 38.107.191.80) has not been recognised as being on a network authorised to view the full text or references of this article. Please contact your serials librarian (subscriptions information).