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La 0 . 67 Sr 0 . 33 MnO 3 nanoparticles synthesized via the sol – gel auto-combustion technique
| Content Provider | Semantic Scholar |
|---|---|
| Author | Saleem, Muhammad Varshney, Dinesh |
| Copyright Year | 2018 |
| Abstract | Herein, rare-earth manganite, La0.67Sr0.33MnO3, has been prepared by a citric acid-assisted sol–gel autocombustion method at a maintained pH value of 11. Room-temperature X-ray diffraction (RT-XRD) data analysis revealed a rhombohedral structure for the sample with the space group R3c, which was further confirmed by synchrotron radiation X-ray diffraction (SR-XRD). Rietveld refinement was carried out for both spectra, which confirmed the SR-XRD and RT-XRD results and the various structural parameters. To determine any of the phase transitions in the sample, temperature-dependent X-ray diffraction corresponding to the temperatures of 100 K, 200 K, 250 K, and 325 K was carried out, and no new phase was found. Temperature-dependent Raman characterization confirmed the metallic phase of the sample with the reduced Jahn–Teller distortion. Scanning electron microscopy confirmed the growth in the grain size as a result of a high sintering temperature. Compositional verification was conducted using energy-dispersive analysis of X-ray diffraction (EDAX). Low-temperature dc resistivity measurement showed a metal-insulator transition temperature (TMI) of z178 K. The DSC-specific heat measurement shows the ferromagnetic metallic nature where heat capacity increases with an increase in temperature. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2018/ra/c7ra09883a |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
