First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3
BiFe _0.5 Mn _0.5 O _3 (BFMO) is an intriguing magnetic double perovskite, only obtainable through high pressure-high temperature synthesis. It shows bulk multiferroic properties, namely the coexistence between a spin canted antiferromagnetic structure superimposed to an externally induced electric...
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| Format: | Article |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ac0737 |
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| author | Brian Sibanda Tebogo Sfiso Mahule Davide Delmonte Andrea Sala Edmondo Gilioli V V Srinivasu |
| author_facet | Brian Sibanda Tebogo Sfiso Mahule Davide Delmonte Andrea Sala Edmondo Gilioli V V Srinivasu |
| author_sort | Brian Sibanda |
| collection | DOAJ |
| description | BiFe _0.5 Mn _0.5 O _3 (BFMO) is an intriguing magnetic double perovskite, only obtainable through high pressure-high temperature synthesis. It shows bulk multiferroic properties, namely the coexistence between a spin canted antiferromagnetic structure superimposed to an externally induced electric polarization at least from 77 K. In particular, the system is characterized by a significant weak ferromagnetic hysteresis loop and by a very rare phenomenon: the spontaneous magnetization reversal (MRV) versus temperature in the low field regime. To clarify the BFMO exotic magnetic phase in the low field regime, the Electron Spin Resonance (ESR) and the low field microwave absorption (LFMA) techniques were used, providing the first observation of LFMA in the bulk BFMO as an additional functionality of this material. A striking feature is that the hysteresis in LFMA signals vanishes above 45 K, while the bulk M-H loop hysteresis, measured in the same field range of LFMA, persists till room temperature. The temperature at which LFMA hysteresis vanishes qualitatively matches the position of the magnetic susceptibility’s second derivative peak, corresponding to the temperature at which the local second order mechanism responsible for MRV is maximum. The line shape of LFMA completely changes above 45 K and the ESR linewidth starts decreasing above this temperature, indicating the role of defect/disorder induced inhomogeneity. The temperature evolution of LFMA hysteresis and line shapes as a measure of the competition between Fe- and Mn-rich clusters suggests a sort of local frustration at the microscopic scale, responsible for the peculiar magnetization reversal of this system. |
| first_indexed | 2024-03-12T15:43:59Z |
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| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:43:59Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-543eeebc938f43029d79bca70cd1aa322023-08-09T15:49:59ZengIOP PublishingMaterials Research Express2053-15912021-01-018606610110.1088/2053-1591/ac0737First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3Brian Sibanda0Tebogo Sfiso Mahule1Davide Delmonte2https://orcid.org/0000-0001-5367-527XAndrea Sala3https://orcid.org/0000-0001-7265-9187Edmondo Gilioli4V V Srinivasu5Department of Physics, University of South Africa , Johannesburg 1710, South AfricaDepartment of Physics, University of South Africa , Johannesburg 1710, South AfricaInstitute of Materials for Electronics and Magnetism, IMEM-CNR, Parma, ItalyInstitute of Materials for Electronics and Magnetism, IMEM-CNR, Parma, ItalyInstitute of Materials for Electronics and Magnetism, IMEM-CNR, Parma, ItalyDepartment of Physics, University of South Africa , Johannesburg 1710, South AfricaBiFe _0.5 Mn _0.5 O _3 (BFMO) is an intriguing magnetic double perovskite, only obtainable through high pressure-high temperature synthesis. It shows bulk multiferroic properties, namely the coexistence between a spin canted antiferromagnetic structure superimposed to an externally induced electric polarization at least from 77 K. In particular, the system is characterized by a significant weak ferromagnetic hysteresis loop and by a very rare phenomenon: the spontaneous magnetization reversal (MRV) versus temperature in the low field regime. To clarify the BFMO exotic magnetic phase in the low field regime, the Electron Spin Resonance (ESR) and the low field microwave absorption (LFMA) techniques were used, providing the first observation of LFMA in the bulk BFMO as an additional functionality of this material. A striking feature is that the hysteresis in LFMA signals vanishes above 45 K, while the bulk M-H loop hysteresis, measured in the same field range of LFMA, persists till room temperature. The temperature at which LFMA hysteresis vanishes qualitatively matches the position of the magnetic susceptibility’s second derivative peak, corresponding to the temperature at which the local second order mechanism responsible for MRV is maximum. The line shape of LFMA completely changes above 45 K and the ESR linewidth starts decreasing above this temperature, indicating the role of defect/disorder induced inhomogeneity. The temperature evolution of LFMA hysteresis and line shapes as a measure of the competition between Fe- and Mn-rich clusters suggests a sort of local frustration at the microscopic scale, responsible for the peculiar magnetization reversal of this system.https://doi.org/10.1088/2053-1591/ac0737low field microwave absorptionmultiferroicsspontaneous magnetization reversalelectron spin resonance |
| spellingShingle | Brian Sibanda Tebogo Sfiso Mahule Davide Delmonte Andrea Sala Edmondo Gilioli V V Srinivasu First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3 Materials Research Express low field microwave absorption multiferroics spontaneous magnetization reversal electron spin resonance |
| title | First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3 |
| title_full | First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3 |
| title_fullStr | First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3 |
| title_full_unstemmed | First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3 |
| title_short | First detection of low field microwave absorption in the disordered multiferroic double perovskite BiFe0.5Mn0.5O3 |
| title_sort | first detection of low field microwave absorption in the disordered multiferroic double perovskite bife0 5mn0 5o3 |
| topic | low field microwave absorption multiferroics spontaneous magnetization reversal electron spin resonance |
| url | https://doi.org/10.1088/2053-1591/ac0737 |
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