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Large electromechan...
Large electromechanical strain and unconventional domain switching near phase convergence in a Pb-free ferroelectric
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- Venkateshwarlu, Sarangi (författare)
- City University of Hong Kong
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- Venkataraman, Lalitha K. (författare)
- Technical University of Darmstadt
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- Segouin, Valentin (författare)
- University of Paris-Saclay,Paris-Sorbonne University
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- Marlton, Frederick P. (författare)
- Aarhus University
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- Hin, Ho Chin (författare)
- City University of Hong Kong
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- Chernyshov, Dmitry (författare)
- European Synchrotron Radiation Facility,St. Petersburg State Polytechnical University
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- Ren, Yang (författare)
- Argonne National Laboratory
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- Jørgensen, Mads R.V. (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,Aarhus University
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- Nayak, Sanjib (författare)
- City University of Hong Kong
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- Rödel, Jürgen (författare)
- Technical University of Darmstadt
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- Daniel, Laurent (författare)
- Paris-Sorbonne University,University of Paris-Saclay
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- Pramanick, Abhijit (författare)
- City University of Hong Kong
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(creator_code:org_t)
- 2020-10-30
- 2020
- Engelska.
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Ingår i: Communications Physics. - : Springer Science and Business Media LLC. - 2399-3650. ; 3:1
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://www.nature.c...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In many ferroelectrics, large electromechanical strains are observed near regions of composition- or temperature- driven phase coexistence. Phenomenologically, this is attributed to easy re-orientation of the polarization vector and/or phase transition, although their effects are highly convoluted and difficult to distinguish experimentally. Here, we used synchrotron X-ray scattering and digital image correlation to differentiate between the microscopic mechanisms leading to large electrostrains in an exemplary Pb-free piezoceramic Sn-doped barium calcium zirconate titanate. Large electrostrains of ~0.2% measured at room-temperature are attributed to an unconventional effect, wherein polarization switching is aided by a reversible phase transition near the tetragonal-orthorhombic phase boundary. Additionally, electrostrains of ~0.1% or more could be maintained from room temperature to 140 °C due to a succession of different microscopic mechanisms. In situ X-ray diffraction elucidates that while 90° domain reorientation is pertinent below the Curie temperature (TC), isotropic distortion of polar clusters is the dominant mechanism above TC.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Venkateshwarlu, ...
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Venkataraman, La ...
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Segouin, Valenti ...
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Marlton, Frederi ...
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Hin, Ho Chin
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Chernyshov, Dmit ...
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visa fler...
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Ren, Yang
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Jørgensen, Mads ...
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Nayak, Sanjib
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Rödel, Jürgen
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Daniel, Laurent
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Pramanick, Abhij ...
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visa färre...
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