Effect of Sr Doping on Structure and Emittance of La sub(1-x)Sr sub(x)MnO sub(3) Smart Thermal Control Films

Sr-doped lanthanum manganite (La sub(1-x)Sr sub(x)MnO sub(3)) is characteristic of thermochromic, which can act as a smart thermal control material used in the variable-emittance devices. In the present study, La sub(1-x)Sr sub(x)MnO sub(3) thin films were prepared on MgO(100) substrates by pulsed l...

Full description

Saved in:
Bibliographic Details
Published in:Key engineering materials 2014-03, Vol.602-603, p.902-905
Main Authors: Shen, Yong Jun, Wang, Chuan Bin, Li, Ling, Shen, Qiang, Zhang, Lian Meng
Format: Article
Language:English
Subjects:
Doping
Emittance
Infrared
Manganites
Strontium
Surface layer
Texture
Thin films
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Sr-doped lanthanum manganite (La sub(1-x)Sr sub(x)MnO sub(3)) is characteristic of thermochromic, which can act as a smart thermal control material used in the variable-emittance devices. In the present study, La sub(1-x)Sr sub(x)MnO sub(3) thin films were prepared on MgO(100) substrates by pulsed laser deposition, and the effect of Sr-doping (x = 0 ~ 0.4) on the structure and infrared emissivity was investigated. Single-phased La sub(1-x)Sr sub(x)MnO sub(3) films with (100)-orientation were obtained, which showed a dense texture with smooth surface. The ratio of Mn super(4+)/Mn super(3+) in the films was increased with increasing Sr doping, leading to the enhancement in double-exchange interaction and electrical conductivity. As a result, the phase transition from metal to insulator was observed with the increasing of test temperature. For the La sub(0.8)Sr sub(0.2)MnO sub(3) thin film, a large value of emittance (De = 0.28) was obtained, indicating good variable-emittance by appropriate Sr doping.
ISSN:1013-9826
DOI:10.4028/www.scientific.net/KEM.602-603.902