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HomeMaterials Science ForumMaterials Science Forum Vol. 984Infrared Emissivity of La0.8Sr0.2MnO3 under...

Infrared Emissivity of La_0.8Sr_0.2MnO₃ under 0.76-2.5 μm and 2.5-500 μm Radiation Fields

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Abstract:

La_0.8Sr_0.2MnO₃ was prepared to investigate the infrared emissivity of the sample under 0.76-2.5 μm and 2.5-500 μm infrared fields. The sample exhibited characteristic peaks of rhombohedral perovskite structure at 298-318 K, and split of the main peak weakened with increasing temperature. Intensity of the ferromagnetic resonance peak enhanced with increasing temperature, and the peak was shifted toward high magnetic field. A weak paramagnetic resonance peak appeared at 318 K, indicating that ferromagnetic-paramagnetic transition was occurring. The temperature of the sample under 2.5-500 μm field was higher than that under 0.76-2.5 μm. The emissivity of the sample increased with radiation time under 2.5-500 μm, but it had no obvious changes at about 0.665 under 0.76-2.5 μm. The emissivities at the same temperature fields were higher than those under 0.76-2.5 μm and 2.5-500 μm fields, respectively. It suggested that 0.76-2.5 μm and 2.5-500 μm radiations had inhibition effect on emissivity of La_0.8Sr_0.2MnO₃.

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Periodical:

Materials Science Forum (Volume 984)

Pages:

110-115

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.984.110

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Online since:

April 2020

Authors:

Xing Mei Shen*, Ya Dong Dong, Jian Wang, Xing Rong Wu, Fa Bin Cao

Keywords:

Emissivity, Infrared Field, La_0.8Sr_0.2MnO₃, Phase Transition, Resonance

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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