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Investigating the Electromechanical Behavior of Unconventionally Ferroelectric Hf0.5Zr0.5O2-Based Capacitors Through Operando Nanobeam X-Ray Diffraction

Stylianidis, Evgenios ; Surabhi, Pranav ; Hamming-Green, Ruben ; Salverda, Mart ; Wei, Yingfen ; Burema, Arjan ; Matzen, Sylvia ; Banerjee, Tamalika ; Björling, Alexander LU and Mukherjee, Binayak , et al. (2023) In Advanced Electronic Materials 9(6).
Abstract

Understanding various aspects of ferroelectricity in hafnia-based nanomaterials is of vital importance for the development of future nonvolatile memory and logic devices. Here, the unconventional and weak electromechanical response of epitaxial La0.67Sr0.33MnO3/Hf0.5Zr0.5O2/La0.67Sr0.33MnO3 ferroelectric capacitors is investigated, via the sensitivity offered by nanobeam X-ray diffraction experiments during application of electrical bias. It is shown that the pristine rhombohedral phase exhibits a linear piezoelectric effect with piezoelectric coefficient (|d33|) ≈ 0.5–0.8 pmV−1. It is found that the piezoelectric... (More)

Understanding various aspects of ferroelectricity in hafnia-based nanomaterials is of vital importance for the development of future nonvolatile memory and logic devices. Here, the unconventional and weak electromechanical response of epitaxial La0.67Sr0.33MnO3/Hf0.5Zr0.5O2/La0.67Sr0.33MnO3 ferroelectric capacitors is investigated, via the sensitivity offered by nanobeam X-ray diffraction experiments during application of electrical bias. It is shown that the pristine rhombohedral phase exhibits a linear piezoelectric effect with piezoelectric coefficient (|d33|) ≈ 0.5–0.8 pmV−1. It is found that the piezoelectric response is suppressed above the coercive voltage. For higher voltages, and with the onset of DC conductivity throughout the capacitor, a second-order effect is observed. The work sheds light into the electromechanical response of rhombohedral Hf0.5Zr0.5O2 and suggests its (un)correlation with ferroelectric switching.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electrochemical polarization, first-principles, nanobeam diffraction, rhombohedral Hf Zr O
in
Advanced Electronic Materials
volume
9
issue
6
article number
2201298
publisher
Wiley-Blackwell
external identifiers
  • scopus:85153484870
ISSN
2199-160X
DOI
10.1002/aelm.202201298
language
English
LU publication?
yes
id
102e86ee-d009-41fe-a770-a4bb1fe6ea71
date added to LUP
2023-07-14 14:01:21
date last changed
2023-07-14 14:01:21
@article{102e86ee-d009-41fe-a770-a4bb1fe6ea71,
  abstract     = {{<p>Understanding various aspects of ferroelectricity in hafnia-based nanomaterials is of vital importance for the development of future nonvolatile memory and logic devices. Here, the unconventional and weak electromechanical response of epitaxial La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/Hf<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub>/La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> ferroelectric capacitors is investigated, via the sensitivity offered by nanobeam X-ray diffraction experiments during application of electrical bias. It is shown that the pristine rhombohedral phase exhibits a linear piezoelectric effect with piezoelectric coefficient (|d<sub>33</sub>|) ≈ 0.5–0.8 pmV<sup>−1</sup>. It is found that the piezoelectric response is suppressed above the coercive voltage. For higher voltages, and with the onset of DC conductivity throughout the capacitor, a second-order effect is observed. The work sheds light into the electromechanical response of rhombohedral Hf<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub> and suggests its (un)correlation with ferroelectric switching.</p>}},
  author       = {{Stylianidis, Evgenios and Surabhi, Pranav and Hamming-Green, Ruben and Salverda, Mart and Wei, Yingfen and Burema, Arjan and Matzen, Sylvia and Banerjee, Tamalika and Björling, Alexander and Mukherjee, Binayak and Dutta, Sangita and Aramberri, Hugo and Íñiguez, Jorge and Noheda, Beatriz and Carbone, Dina and Nukala, Pavan}},
  issn         = {{2199-160X}},
  keywords     = {{electrochemical polarization; first-principles; nanobeam diffraction; rhombohedral Hf Zr O}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Advanced Electronic Materials}},
  title        = {{Investigating the Electromechanical Behavior of Unconventionally Ferroelectric Hf<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub>-Based Capacitors Through Operando Nanobeam X-Ray Diffraction}},
  url          = {{http://dx.doi.org/10.1002/aelm.202201298}},
  doi          = {{10.1002/aelm.202201298}},
  volume       = {{9}},
  year         = {{2023}},
}