Large magnetoresistance and relative cooling power in polycrystalline Pr0.775Sr0.225MnO3 compound
| Autor: | I. Das, Sanjib Banik |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Phase boundary
Materials science Condensed matter physics Magnetoresistance Doping Insulator (electricity) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Metal Ferromagnetism visual_art 0103 physical sciences visual_art.visual_art_medium Magnetic refrigeration Crystallite 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 460:234-238 |
| ISSN: | 0304-8853 |
| Popis: | The effect of the phase boundary of ferromagnetic metallic and ferromagnetic insulator state (FMM-FMI) on magnetotransport and magnetocaloric properties in the Pr 0.775 Sr 0.225 MnO 3 compound has been described in this study. An enhancement of magnetoresistance (MR) has been observed in the Pr 0.775 Sr 0.225 MnO 3 compound compared to the compounds, reside on both sides of the phase boundary (i.e. FMI and FMM phases for Sr doping 0.2 and 0.3 respectively in Pr 1 - x Sr x MnO 3 ). Moreover, a large relative cooling power (RCP), an important parameter for utilization of magnetocaloric materials, has also been achieved in this compound. The large value of RCP has been attributed to the formation of ferromagnetic clusters, formed above the ferromagnetic ordering temperature ( T > T C ) . On the other hand, enhancement of MR is achieved because of the suppression of enhanced phase fluctuations, arises due to the closeness of FMM-FMI phases. |
| Databáze: | OpenAIRE |
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