Structural, electrical and magnetic properties of Nd – A – CoO3 (A = Sr, Ca) Perovskite Powders by Mechanical Alloying
| Autor: | Fatih Samil Uludag, Esra Uludag, Musa Gogebakan, Celal Kursun, Mehmet S. Bozgeyik |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Multidisciplinary
Materials science Ferromagnetic material properties Scanning electron microscope lcsh:R Analytical chemistry lcsh:Medicine 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Article 0104 chemical sciences Transmission electron microscopy lcsh:Q Crystallite lcsh:Science 0210 nano-technology Scherrer equation Perovskite (structure) |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-14 (2018) |
| ISSN: | 2045-2322 |
| Popis: | In this work, NdCoO3 (NCO), Nd0.8Sr0.2CoO3 (NSCO) and Nd0.9Ca0.1CoO3 (NCCO) perovskite cobaltites were synthesised by mechanical alloying method. Structural evolutions, magnetic and electrical properties of these perovskite were systematically examined through X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray detection (SEM-EDX), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), vibration sample magnetometer (VSM) and impedance analyser (IA). The XRD and SEM results revealed that the microstructure of the perovskite materials changed during mechanical alloying. The average crystallite size of the perovskite materials was calculated by Debye Scherrer equation and was confirmed by TEM, and it was determined ~19 nm. From the VSM results, the all perovskites had soft ferromagnetic properties. IA measurements showed that relatively dielectric constants of the perovskites decreased with increasing frequency. Therefore, for the first time, nanostructured NCO, NSCO and NCCO perovskites exhibiting good properties were produced in only two steps which are milling and heating. |
| Databáze: | OpenAIRE |
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