Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering
Low temperature magnetic properties of BiFeO<sub>3</sub> powders sintered by flash and spark plasma sintering were studied. An anomaly observed in the magnetic measurements at 250 K proves the clear existence of a phase transition. This transformation, which becomes less well-defined as...
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MDPI AG
2022-12-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/189 |
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| author | Alejandro Fernando Manchón-Gordón Antonio Perejón Eva Gil-González Maciej Kowalczyk Pedro E. Sánchez-Jiménez Luis A. Pérez-Maqueda |
| author_facet | Alejandro Fernando Manchón-Gordón Antonio Perejón Eva Gil-González Maciej Kowalczyk Pedro E. Sánchez-Jiménez Luis A. Pérez-Maqueda |
| author_sort | Alejandro Fernando Manchón-Gordón |
| collection | DOAJ |
| description | Low temperature magnetic properties of BiFeO<sub>3</sub> powders sintered by flash and spark plasma sintering were studied. An anomaly observed in the magnetic measurements at 250 K proves the clear existence of a phase transition. This transformation, which becomes less well-defined as the grain sizes are reduced to nanometer scale, was described with regard to a magneto-elastic coupling. Furthermore, the samples exhibited enhanced ferromagnetic properties as compared with those of a pellet prepared by the conventional solid-state technique, with both a higher coercivity field and remnant magnetization, reaching a maximum value of 1.17 kOe and 8.5 10<sup>−3</sup> emu/g, respectively, for the specimen sintered by flash sintering, which possesses the smallest grains. The specimens also show more significant exchange bias, from 22 to 177 Oe for the specimen prepared by the solid-state method and flash sintering technique, respectively. The observed increase in this parameter is explained in terms of a stronger exchange interaction between ferromagnetic and antiferromagnetic grains in the case of the pellet sintered by flash sintering. |
| first_indexed | 2024-03-11T09:56:18Z |
| format | Article |
| id | doaj.art-c2afce7ca73046028e7a328303e7bfde |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:56:18Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c2afce7ca73046028e7a328303e7bfde2023-11-16T15:48:16ZengMDPI AGMaterials1996-19442022-12-0116118910.3390/ma16010189Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma SinteringAlejandro Fernando Manchón-Gordón0Antonio Perejón1Eva Gil-González2Maciej Kowalczyk3Pedro E. Sánchez-Jiménez4Luis A. Pérez-Maqueda5Instituto de Ciencia de Materiales de Sevilla, CSIC-Universidad de Sevilla, C. Américo Vespucio 49, 41092 Sevilla, SpainInstituto de Ciencia de Materiales de Sevilla, CSIC-Universidad de Sevilla, C. Américo Vespucio 49, 41092 Sevilla, SpainInstituto de Ciencia de Materiales de Sevilla, CSIC-Universidad de Sevilla, C. Américo Vespucio 49, 41092 Sevilla, SpainFaculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska st., 02-507 Warsaw, PolandInstituto de Ciencia de Materiales de Sevilla, CSIC-Universidad de Sevilla, C. Américo Vespucio 49, 41092 Sevilla, SpainInstituto de Ciencia de Materiales de Sevilla, CSIC-Universidad de Sevilla, C. Américo Vespucio 49, 41092 Sevilla, SpainLow temperature magnetic properties of BiFeO<sub>3</sub> powders sintered by flash and spark plasma sintering were studied. An anomaly observed in the magnetic measurements at 250 K proves the clear existence of a phase transition. This transformation, which becomes less well-defined as the grain sizes are reduced to nanometer scale, was described with regard to a magneto-elastic coupling. Furthermore, the samples exhibited enhanced ferromagnetic properties as compared with those of a pellet prepared by the conventional solid-state technique, with both a higher coercivity field and remnant magnetization, reaching a maximum value of 1.17 kOe and 8.5 10<sup>−3</sup> emu/g, respectively, for the specimen sintered by flash sintering, which possesses the smallest grains. The specimens also show more significant exchange bias, from 22 to 177 Oe for the specimen prepared by the solid-state method and flash sintering technique, respectively. The observed increase in this parameter is explained in terms of a stronger exchange interaction between ferromagnetic and antiferromagnetic grains in the case of the pellet sintered by flash sintering.https://www.mdpi.com/1996-1944/16/1/189flash sinteringspark plasma sinteringbismuth ferritemagnetic propertiesmechanosynthesis |
| spellingShingle | Alejandro Fernando Manchón-Gordón Antonio Perejón Eva Gil-González Maciej Kowalczyk Pedro E. Sánchez-Jiménez Luis A. Pérez-Maqueda Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering Materials flash sintering spark plasma sintering bismuth ferrite magnetic properties mechanosynthesis |
| title | Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering |
| title_full | Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering |
| title_fullStr | Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering |
| title_full_unstemmed | Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering |
| title_short | Low Temperature Magnetic Transition of BiFeO<sub>3</sub> Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering |
| title_sort | low temperature magnetic transition of bifeo sub 3 sub ceramics sintered by electric field assisted methods flash and spark plasma sintering |
| topic | flash sintering spark plasma sintering bismuth ferrite magnetic properties mechanosynthesis |
| url | https://www.mdpi.com/1996-1944/16/1/189 |
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