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Large polarization gradients and temperature-stable responses in compositionally-graded ferroelectrics

Author

Listed:
  • Anoop R. Damodaran

    (University of California)

  • Shishir Pandya

    (University of California)

  • Yubo Qi

    (The Makineni Theoretical Laboratories, University of Pennsylvania)

  • Shang-Lin Hsu

    (University of California)

  • Shi Liu

    (The Makineni Theoretical Laboratories, University of Pennsylvania
    Geophysical Laboratory, Carnegie Institution for Science)

  • Christopher Nelson

    (University of California
    National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory)

  • Arvind Dasgupta

    (University of California)

  • Peter Ercius

    (National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory)

  • Colin Ophus

    (National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory)

  • Liv R. Dedon

    (University of California)

  • Josh C. Agar

    (University of California)

  • Hongling Lu

    (University of California)

  • Jialan Zhang

    (Rutgers University)

  • Andrew M. Minor

    (University of California
    National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory)

  • Andrew M. Rappe

    (The Makineni Theoretical Laboratories, University of Pennsylvania)

  • Lane W. Martin

    (University of California
    Lawrence Berkeley National Laboratory)

Abstract

A range of modern applications require large and tunable dielectric, piezoelectric or pyroelectric response of ferroelectrics. Such effects are intimately connected to the nature of polarization and how it responds to externally applied stimuli. Ferroelectric susceptibilities are, in general, strongly temperature dependent, diminishing rapidly as one transitions away from the ferroelectric phase transition (TC). In turn, researchers seek new routes to manipulate polarization to simultaneously enhance susceptibilities and broaden operational temperature ranges. Here, we demonstrate such a capability by creating composition and strain gradients in Ba1−xSrxTiO3 films which result in spatial polarization gradients as large as 35 μC cm−2 across a 150 nm thick film. These polarization gradients allow for large dielectric permittivity with low loss (ɛr≈775, tan δ

Suggested Citation

  • Anoop R. Damodaran & Shishir Pandya & Yubo Qi & Shang-Lin Hsu & Shi Liu & Christopher Nelson & Arvind Dasgupta & Peter Ercius & Colin Ophus & Liv R. Dedon & Josh C. Agar & Hongling Lu & Jialan Zhang &, 2017. "Large polarization gradients and temperature-stable responses in compositionally-graded ferroelectrics," Nature Communications, Nature, vol. 8(1), pages 1-8, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14961
    DOI: 10.1038/ncomms14961
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    Cited by:

    1. Chen Lin & Zijun Zhang & Zhenbang Dai & Mengjiao Wu & Shi Liu & Jialu Chen & Chenqiang Hua & Yunhao Lu & Fei Zhang & Hongbo Lou & Hongliang Dong & Qiaoshi Zeng & Jing Ma & Xiaodong Pi & Dikui Zhou & Y, 2023. "Solution epitaxy of polarization-gradient ferroelectric oxide films with colossal photovoltaic current," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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