A variable-emittance radiator based on a metal–insulator transition of (La,Sr)MnO3 thin films

Shimakawa, Yuichi; Yoshitake, T.; Kubo, Yoshimi; Machida, Takahiko; Shinagawa, K.; Okamoto, Atsushi; Nakamura, Yasuyuki; Ochi, Atsushi; Tachikawa, Sumitaka; Ohnishi, Akira

doi:10.1063/1.1489079

Cited by 86 publications

(48 citation statements)

References 6 publications

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“…Shimakawa et al [4] investigated the thermochromic properties of La 1−x Sr x MnO 3 films. In their study, the La 1−x Sr x MnO 3 films were synthesized by a sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Emissivity and Optical Properties of Thermochromic Material La0.7Ca0.3−x Sr x MnO3 (0 ≤ x ≤ 0.3)

Fan

Xuan

2011

Int J Thermophys

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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 .

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“…Shimakawa et al [4] investigated the thermochromic properties of La 1−x Sr x MnO 3 films. In their study, the La 1−x Sr x MnO 3 films were synthesized by a sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Emissivity and Optical Properties of Thermochromic Material La0.7Ca0.3−x Sr x MnO3 (0 ≤ x ≤ 0.3)

Fan

Xuan

2011

Int J Thermophys

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“…In addition to the ferromagnetic property, perovskite La-Sr-Mn-O is also characteristic of thermochromic and found recently to be a promising thermal control material used in the variable-emittance devices [5][6][7]. Due to the phase-transition, the emittance of La 1-x Sr x MnO 3 compounds can change significantly with the variation of temperature, i.e., low emissivity at low temperature while high emissivity at high temperature, which makes them attractive as good thermal control materials used in the variable-emittance devices.…”

Section: Introductionmentioning

confidence: 99%

Influence of annealing on structure and thermochromic property of spark plasma sintered La1−xSrxMnO3 compounds

Wang

Shen

et al. 2015

J Mater Sci: Mater Electron

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Sr-doped lanthanum manganite (La 1-x Sr x MnO 3 ) compounds as potential thermal control materials have been prepared by spark plasma sintering followed by annealing at different temperatures. The structure, transport behavior and thermochromic property of the samples were then studied as a function of annealing. With the increasing of annealing temperature, the relative density was increased, and well-crystallized La 1-x Sr x MnO 3 compounds with a dense texture (relative density [ 98 %) were obtained after annealing at 1,273-1,373 K. The measurement of transport property showed an improvement in electrical conductivity due to the increasing of Mn 4? /Mn 3? ratio after annealing, which as a result enhanced the Mn 3? -O-Mn 4? double exchange interaction. The conduction mechanisms above the metal-insulator transition temperature (T P ) was further discussed, and we found that the small polaron hopping model could be applied in this regime. Moreover, the annealed samples tended to reduce the localization of the charge carriers and thereby a decreasing in hopping energy was observed. The infrared emissivity (e) of the La 1-x Sr x MnO 3 compounds changed with temperature and an shape change near T P was observed, which was considered to be associated with the metal-insulator transition. The thermochromic properties were also affected by annealing process, where a larger variability in emissivity (De = 0.38) was obtained for the annealed samples.

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“…Therefore, adjustment of the radiative properties can be realized by modifying material properties and/or constructing periodic structures. The thermochromic materials [1][2][3] and subwavelength structured surfaces [4][5][6][7][8][9][10][11][12] are two examples. Because of the relative difficulty of changing the material properties, the approach of changing the structural features to adjust the radiative characteristics has attracted a growing number of investigations.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Spectral Properties of Metal–Insulator–Metal Film Stack with Rectangular Hole Arrays

2011

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Spectral properties of metal-insulator-metal hole arrays consisting of a dielectric core layer sandwiched between two metallic layers drilled in rectangular hole arrays are investigated using the finite-difference time-domain method in the visible and near-infrared regions. The influences of the thickness and refractive index of the dielectric core layer as well as the thickness of the metallic layer on the spectral absorptance and transmittance are numerically studied. It is found that strong spectral absorption can be excited by the internal-and external-surface plasmon polaritons (SPPs). For some specific structure parameters, the metal-insulator-metal hole arrays show strong absorptance of the incident wave of about 95 % if the internal-and external-SPPs are simultaneously excited.

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A variable-emittance radiator based on a metal–insulator transition of (La,Sr)MnO3 thin films

Cited by 86 publications

References 6 publications

Emissivity and Optical Properties of Thermochromic Material La0.7Ca0.3−x Sr x MnO3 (0 ≤ x ≤ 0.3)

Emissivity and Optical Properties of Thermochromic Material La0.7Ca0.3−x Sr x MnO3 (0 ≤ x ≤ 0.3)

Influence of annealing on structure and thermochromic property of spark plasma sintered La1−xSrxMnO3 compounds

Investigation on Spectral Properties of Metal–Insulator–Metal Film Stack with Rectangular Hole Arrays

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