Electronic configuration and magnetic properties of La0.7Ca0.3Mn1-xFexO3 perovskite NPs: The effect of a lower Fe3+ concentration
| Autor: | Kalu Onyekachi, A. Reyes-Rojas, J. A. Duarte-Moller, J.A. Matutes-Aquino, V.-H. Ramos-Sánchez, A. Concha-Balderrama, H. A. Martinez-Rodriguez, M.H. Bocanegra-Bernal, J.F. Jurado, G. Herrera-Pérez |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Magnetic moment Mechanical Engineering Metals and Alloys Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Magnetization Magnetic anisotropy Paramagnetism Ferromagnetism Mechanics of Materials Chemical physics Materials Chemistry 0210 nano-technology Perovskite (structure) Solid solution |
| Zdroj: | Journal of Alloys and Compounds. 816:152668 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.152668 |
| Popis: | Effect of nanoparticle size on electronic configuration and magnetic properties of La0.7Ca0.3Mn1-xFexO3 (x = 0, 0.005, 0.01, 0.015 and 0.02) perovskites have been investigated. Magnetic properties are dependent on nanoparticle size. It was noted that independently of the 3d5 ion concentration, if the ABO3 perovskite solid solution has small enough NPs, they might induce a magnetization mechanism, which is thermally fluctuated, causing magnetic anisotropy of individual grains, and consequently reducing the solid solution’s magnetic moment. The 3d5 ion (Fe3+) concentration with its incomplete d shell plays an important role in the double exchange, DE. Subsequently, NPs around 28 nm are strongly influenced at 100 K by a paramagnetic to ferromagnetic transition, which presents a spin glass-type order as the temperature continues to decrease. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect