Shaping the Magnetic Properties of BaFeO3 Perovskite-Type by Alkaline-Earth Doping
| Autor: | Jang Gun Kim, Satoshi Noguchi, Timur Sh. Atabaev, Makio Kurisu, Nguyen Hoa Hong, Kensuke Konishi, Souraya Goumri-Said, Mohammed Benali Kanoun |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Magnetic moment 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Magnetic field General Energy Ferromagnetism Magnet 0103 physical sciences Antiferromagnetism Curie temperature Physical and Theoretical Chemistry 0210 nano-technology Perovskite (structure) |
| Zdroj: | The Journal of Physical Chemistry C. 122:2983-2989 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.7b10127 |
| Popis: | The alkaline-earth iron perovskites AFeO3 are interesting materials since their ferromagnetic domains could be controlled by an applied magnetic field. However, to be exploited for applications, there are still some flaws related to their antiferromagnetic or ferromagnetic behavior at low temperatures. In our work, we have attempted to synthesize pristine BaFeO3 with Ba to partially or fully substitute Sr or Ca in order to tailor the magnetic properties of the host compound as expected for applications. We found that powders of (Ca/Sr/Ba) FeO3 showed an increased enhancement of magnetic properties in comparison to BaFeO3 films. In particular, the (Ca/Sr)0.5Ba0.5FeO3 nanopowders have demonstrated a Curie temperature well above room temperature along with an increased magnetic moment. A considerable coercivity is also surprisingly obtained as a typical signature for a hard magnetic material. First-principles calculations were performed to get an insight into the Ca/Sr influence on the lattice structure, and... |
| Databáze: | OpenAIRE |
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