| Title: | Large high-temperature piezoelectric response of lead-free ▫$BiFeO_3–BaTiO_3$▫ originating from relaxor disorder |
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| Authors: | ID Iacomini, Antonio, Institut "Jožef Stefan" (Author)
ID Roknić, Janina, Institut "Jožef Stefan" (Author)
ID Sidibe, Issa (Author)
ID Scavini, Marco (Author)
ID Otoničar, Mojca, Institut "Jožef Stefan" (Author)
ID Uršič Nemevšek, Hana, Institut "Jožef Stefan" (Author)
ID Rojac, Tadej, Institut "Jožef Stefan" (Author) |
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| Files: |  PDF - Presentation file, download (2,35 MB)
MD5: 5C8FE27A9FF6C6F980891F497D8F0242
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | To date, no piezoelectric material system has been developed that would match the piezoelectric performance of the group of lead-based relaxor ferroelectrics, such as Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT). In the quest to f ind alternatives, continuous efforts have been made to understand the complex microscopic origins leading to the large macroscopic piezoelectric response of PMN–PT and similar lead-based perovskites with relaxor characteristics. Despite significant advances, it is still unclear whether those concepts can be efficiently used to develop lead-free relaxor ferroelectric alternatives. Here, a large piezoelectric response of BiFeO3–BaTiO3 (BFO–BTO) ceramics is reported, characterized by a d33 coefficient of 1200 pmV−1 measured at 325 °C, 1 kV cm−1 of driving field and 90 Hz of field frequency. While composed of multiple contributions, the large response is found to be dominated by a strongly nonlinear and hysteretic process, likely associated with the dynamics of hierarchically arranged nanodomain walls, thus resembling the mechanisms operating in lead-based relaxor materials. Although the response is triggered upon elevated thermal energy, the results provide valuable information about the microscopic behavior that can be potentially used to tailor the response of lead-free relaxor ferroelectrics and bring them closer to the highly performant lead-based perovskites |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 25.02.2025 |
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| Publication date: | 09.06.2025 |
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| Publisher: | Wiley |
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| Year of publishing: | 2025 |
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| Number of pages: | str. 1-15 |
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| Numbering: | Art. 2502379 |
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| Source: | ZDA |
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| PID: | 20.500.12556/DiRROS-22646  |
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| UDC: | 544.5/.6 |
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| ISSN on article: | 1613-6829 |
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| DOI: | 10.1002/smll.202502379 |
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| COBISS.SI-ID: | 238924547 |
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| Copyright: | © 2025 The Author(s) |
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| Publication date in DiRROS: | 13.06.2025 |
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| Views: | 439 |
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| Downloads: | 147 |
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