NDLI: Emissivity and Optical Properties of Thermochromic Material La$_{0.7}$Ca$_{0.3−x }$Sr$_{ x }$MnO$

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Emissivity and Optical Properties of Thermochromic Material La$_{0.7}$Ca$_{0.3−x }$Sr$_{ x }$MnO$_{3}$ (0 ≤ x ≤ 0.3)

Content Provider	Springer Nature Link
Author	Fan, Desong Li, Qiang Xuan, Yimin
Copyright Year	2011
Abstract	La$_{0.7}$Ca$_{0.3−x }$Sr$_{ x }$MnO$_{3}$ (0 ≤ x ≤ 0.3) (LCSMO) is a thermochromic material. The material can show a phase transition from ferromagnetic-metal to paramagnetic-insulator under the appropriate doping level (x). In this paper, LCSMO compounds were synthesized by a conventional solid-state reaction method. The normal emissivity and the spectral reflectance of LCSMO with different doping levels (x) are experimentally investigated. Based on the spectral reflectance data, the optical constants (refractive index n and extinction coefficient k) are calculated by using Kramers–Kronig (K–K) relations. Then, the emissivity changing mechanism is discussed. The experimental results show that the emissivity of LCSMO increases with increasing temperature. For the samples with x = 0.1 and 0.15, their emissivity has a sudden change in the vicinity of the phase transition temperature T $_{p}$.
Starting Page	2127
Ending Page	2138
Page Count	12
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	32
Issue Number	10
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2011-08-11
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Kramers–Kronig relations Normal emissivity Spectral reflectance Thermochromic material Physical Chemistry Mechanics Condensed Matter Physics Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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Theoretical Work on Effect of Pressure on Magnetocaloric Properties of $$\hbox {La}_{0.7}\hbox {Ca}_{0.3}\hbox {MnO}_{3}$$

Damping and softening of transverse acoustic phonons in colossal magnetoresistive La$_{0.7}$Ca$_{0.3}$MnO$_3$ and La$_{0.7}$Sr$_{0.3}$MnO$_3$

Thermoelectric Properties of (1-x)LaCoO$_{3.x}$La$_{0.7}$Sr$_{0.3}$MnO$_3$ Composite

Thermal Diffusivity of La$_{1−x }$Sr$_{ x }$MnO$_{3}$ (x < 0.3)

Ferromagnetism in lacunar perovskite manganites Pr 0.7 Sr 0.3 - x x MnO 3 and Pr 0.7 - x x Sr 0.3 MnO 3

Spontaneous magnetization above $T_C$ in polycrystalline La$_{0.7}$Ca$_{0.3}$MnO$_3$ and La$_{0.7}$Ba$_{0.3}$MnO$_3$

Magneto-transport properties of La$_{0.7}$Ca$_{0.3}$MnO$_{3}$/SrTiO$_{3}$/La$_{0.7}$Ce$_{0.3}$MnO$_{3}$ tunnel junction

Interface-driven magnetic anisotropy in relaxed La$_{0.7}$Sr$_{0.3}$CrO$_3$/La$_{0.7}$Sr$_{0.3}$MnO$_3$ heterostructures on MgO

The interplay of Ca and Sr in the bulk magnetocaloric La$_{0.7}$Sr$_{(0.3−x)}$Ca$_{ x }$MnO$_{3}$ (x = 0, 0.1 and 0.3) manganite

Emissivity and Optical Properties of Thermochromic Material La$_{0.7}$Ca$_{0.3−x }$Sr$_{ x }$MnO$_{3}$ (0 ≤ x ≤ 0.3)

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Emissivity and Optical Properties of Thermochromic Material La$_{0.7}$Ca$_{0.3−x }$Sr$_{ x }$MnO$_{3}$ (0 ≤ x ≤ 0.3)