Structural and magnetic effects on thermal emittance of La1−xSrxMnO3 from the first principles calculation
| Autor: | Wen-Jiang Lu, Fu-Ling Tang, Yudong Feng, Jiang-Fei Liu, Hong-Tao Xue |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Permittivity
Materials science Condensed matter physics Magnetism Crystal structure Dielectric Condensed Matter Physics Concentration ratio Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Physics::Accelerator Physics Condensed Matter::Strongly Correlated Electrons Thermal emittance Orthorhombic crystal system Dimensionless quantity |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 390:31-35 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2015.04.070 |
| Popis: | Generalized gradient approximation (GGA) exchange-correlation functional was used in the first-principles method to calculate thermal emittance of La 1− x Sr x MnO 3 (LSMO). The effects of structure and magnetism on thermal emittance of LSMO were systematically investigated by the complex dielectric function. It is found that the LSMO with orthorhombic structure has a higher thermal emittance than that with rhombohedral structure at the same temperature. When the magnetism varying with temperature of LSMO is put into consideration, the magnetic different make a significant change on thermal emittance and the variation of thermal emittance of La 0.75 Sr 0.25 MnO 3 is the biggest among x =0, 0.2, 0.25, 0.5. It is found that thermal emittance have a low value at the low temperature and have a high value at the high temperature, due to the unique feature of variable thermal emittance based on metal-insulator transition, which makes LSMO attractive as potential thermal control materials. |
| Databáze: | OpenAIRE |
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