Magnetocaloric effect in (La0.7Sr0.3MnO3)1−x –(BaTiO3) x solid solution spin-glass system
| Autor: | Mayukh K. Ray, Chiranjib Nayek, Arnab Pal, I. M. Obaidat, Pattukkannu Murugavel |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Spin glass Materials science Mechanical Engineering Analytical chemistry 02 engineering and technology Trigonal crystal system 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Crystallography Mechanics of Materials 0103 physical sciences Cooling power Solid mechanics Magnetic refrigeration General Materials Science Orthorhombic crystal system 0210 nano-technology Solid solution |
| Zdroj: | Journal of Materials Science. 53:2405-2412 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-017-1718-x |
| Popis: | (La0.7Sr0.3MnO3)1−x –(BaTiO3) x solid solution samples (x = 0, 0.03, and 0.08) were synthesized by sol–gel route. Pure La0.7Sr0.3MnO3 has orthorhombic structure with Pbnm space group whereas solid solution samples possess rhombohedral structure with R-3c space group. Temperature-dependent ac susceptibility at different frequencies and memory effect confirmed the spin-glass behavior in these samples. The samples exhibited magnetocaloric coefficient around room temperature. The maximum values of magnetic entropy change observed in our samples are 0.45, 0.86, and 1.07 J Kg−1 K−1 for x = 0.03 and 0.62, 1.23 and 1.56 J Kg−1 K−1 for x = 0.08 compounds at 2, 4, and 5 T applied magnetic fields, respectively. The relative cooling power values for x = 0.03 and 0.08 are 55.9 and 116.5 J Kg−1, respectively, at 5 T. The observed multifunctional properties of the studied system give a new direction to explore the magnetocaloric effect in similar such systems. |
| Databáze: | OpenAIRE |
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