Sub-lattice polarization states in anti-ferroelectrics and their relaxation process
Research output: Contribution to journal › Article › peer-review
We report studies of quasi-remanent polarization states in Pb0.99Nb0.02 [(Zr0.57Sn0.43) 0.94Ti0.06] 0.98O3 (PNZST) anti-ferroelectric ceramics and investigation of their relaxation effects using unique insitu electrically activated time-resolved Synchrotron X-ray powder diffraction (SXPD) and 119Sn Mössbauer Spectroscopy (MS). The SXPD patterns are consistent with a phase transition from quasi-tetragonal perovskite in 0V relaxed anti-ferroelectric state to rhombohedral distortion in ferroelectric state under saturating applied voltages of 2kV. The observed quasi-remanent polarization relaxation processes are due to the fact that tetragonal to rhombohedral distortion does not occur at the applied voltage required to access the quasi-remanent polarization states, and the tetragonal symmetry restored after the removal of the applied electric field is preserved. Since these quasi-remanent polarization states were seen as possibly suitable for memory applications, the implications of this study are that anti-ferroelectrics are more feasible for multi-state dynamic random access memories (DRAM), while their application to non-volatile memories requires development of more sophisticated "read-out" protocols, possibly involving dc electrical biasing.
Original language | English |
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Pages (from-to) | 651-656 |
Number of pages | 6 |
Journal | Current Applied Physics |
Volume | 19 |
Issue number | 5 |
Early online date | 15 Mar 2019 |
DOIs | |
Publication status | Published - 1 May 2019 |
Documents
- manuscript_CAP_D_19_00089
Accepted author manuscript (Post-print), 780 KB, PDF document
Licence: CC BY-NC-ND
Related information
Outputs
Non-equilibrium polarization dynamics in anti-ferroelectrics
Research output: Contribution to journal › Article › peer-review
4-state anti-ferroelectric random access memory
Research output: Contribution to journal › Article › peer-review
Activities
Diamond Light Source
Activity: Visiting an external organisation types › Visiting an external academic institution
Iowa State University
Activity: Visiting an external organisation types › Visiting an external academic institution
Projects
Investigation of novel memory effect in anti-ferroelectric materials
Project: Research
Student Theses
Development of flexible thin films using plasma sputtering and control of their magnetic properties via Substrate roughness
Student thesis: Doctoral Thesis
ID: 13400629