Colossal Strain Tuning of Ferroelectric Transitions in KNbO3 Thin Films

A strong coupling of polarization (P) and strain (πœ€) in ferroelectric complex oxides offers unique opportunities to dramatically tune their properties. Here we demonstrate colossal strain tuning of ferroelectricity in epitaxial KNbO3 thin films grown by sub-oxide molecular beam epitaxy. While bulk KNbO3 exhibits three ferroelectric transitions and a Curie temperature (Tc) of ~676 K, our phase-field modeling predicts that a biaxial strain of as little as -0.6% pushes its Tc >975 K, its decomposition temperature in air, and for -1.4% strain, to Tc >1325 K, its melting point. Furthermore, a strain of -1.5% can stabilize a single phase throughout the entire temperature range of its stability. A combination of temperature-dependent second harmonic generation, synchrotron-based x-ray reciprocal space mapping, ferroelectric measurements, and transmission electron microscopy reveal a single tetragonal phase from 10 K-975 K, an enhancement of ~46% in the tetragonal phase remanent polarization (Pr), and a ~200% enhancement in its optical second harmonic generation coefficients over bulk values. These properties in a lead-free system but with properties comparable or superior to lead-based systems make it an attractive candidate for applications ranging from high temperature ferroelectric memory to cryogenic temperature quantum computing.

Files

Metadata

Work Title Colossal Strain Tuning of Ferroelectric Transitions in KNbO3 Thin Films
Access
Penn State
Creators
  1. Sankalpa Hazra
  2. Tobias Schwaigert
  3. Aiden Ross
  4. Haidong Lu
  5. Utkarsh Saha
  6. Victor Trinquet
  7. Betul Akkopru Akgun
  8. Benjamin Z. Gregory
  9. Anudeep Mangu
  10. Suchismita Sarker
  11. Tatiana Kuznetsova
  12. Saugata Sarker
  13. Xin Li
  14. Matthew R. Barone
  15. Xiaoshan Xu
  16. John W. Freeland
  17. Roman Engel-Herbert
  18. Aaron M. Lindenberg
  19. Andrej Singer
  20. Susan E Trolier-Mckinstry
  21. David A. Muller
  22. Gian-Marco Rignanese
  23. Salva Salmani-Rezaie
  24. Vladmir A. Stoica
  25. Alexei Gruverman
  26. Long-Qing Chen
  27. Darrell G. Schlom
  28. Venkatraman Gopalan
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Advanced Materials
Publication Date November 12, 2024
Publisher Identifier (DOI)
  1. https://doi.org/10.1002/adma.202408664
Deposited December 09, 2024

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created

    December 09, 2024 14:07 by sco3

  • Updated

    December 09, 2024 14:07 by [unknown user]

  • Updated Description, Publication Date Show Changes

    December 09, 2024 14:14 by sco3

    Description
    • A strong coupling of polarization (P) and strain (πœ€) in ferroelectric complex oxides offers unique opportunities to dramatically tune their properties. Here we demonstrate colossal strain tuning of ferroelectricity in epitaxial KNbO3 thin films grown by sub-oxide molecular beam epitaxy. While bulk KNbO3 exhibits three ferroelectric transitions and a Curie temperature (Tc) of ~676 K, our phase-field modeling predicts that a biaxial strain of as little as -0.6% pushes its Tc >975 K, its decomposition temperature in air, and for -1.4% strain, to Tc >1325 K, its melting point. Furthermore, a strain of -1.5% can stabilize a single phase throughout the entire temperature range of its stability. A combination of temperature-dependent second harmonic generation, synchrotron-based x-ray reciprocal space mapping, ferroelectric measurements, and transmission electron microscopy reveal a single tetragonal phase from 10 K-975 K, an enhancement of ~46% in the tetragonal phase remanent polarization (Pr), and a ~200% enhancement in its optical second harmonic generation coefficients over bulk values. These properties in a lead-free system but with properties comparable or superior to lead-based systems make it an attractive candidate for applications ranging from high temperature ferroelectric memory to cryogenic temperature quantum computing.
    Publication Date
    • 2024
  • Added Creator Sadie Spicer

    December 09, 2024 14:15 by sco3

  • Added Main text_KNbO3 strain tuning.pdf

    December 09, 2024 14:16 by sco3

  • Added SI KNbO3 manuscript.pdf

    December 09, 2024 14:16 by sco3

  • Updated

    December 09, 2024 14:18 by sco3

  • Updated License Show Changes

    December 09, 2024 14:24 by sco3

    License
    • https://rightsstatements.org/page/InC/1.0/
  • Updated

    December 09, 2024 14:24 by sco3

  • Updated

    December 09, 2024 14:24 by sco3

  • Updated Publisher, Publisher Identifier (DOI), Publication Date Show Changes

    December 10, 2024 11:59 by jts5573

    Publisher
    • Wiley
    Publisher Identifier (DOI)
    • https://doi.org/10.1002/adma.202408664
    Publication Date
    • 2024
    • 2024-11-12
  • Updated Publisher Show Changes

    December 19, 2024 10:50 by jts5573

    Publisher
    • Wiley
    • Advanced Materials
  • Deleted Creator Sadie Spicer

    January 02, 2025 14:24 by jts5573

  • Added Creator Sankalpa Hazra

    January 02, 2025 14:24 by jts5573

  • Added Creator Tobias Schwaigert

    January 02, 2025 14:24 by jts5573

  • Added Creator Aiden Ross

    January 02, 2025 14:24 by jts5573

  • Added Creator Haidong Lu

    January 02, 2025 14:24 by jts5573

  • Added Creator Utkarsh Saha

    January 02, 2025 14:24 by jts5573

  • Added Creator Victor Trinquet

    January 02, 2025 14:24 by jts5573

  • Added Creator Betul Akkopru Akgun

    January 02, 2025 14:24 by jts5573

  • Added Creator Benjamin Z. Gregory

    January 02, 2025 14:24 by jts5573

  • Added Creator Anudeep Mangu

    January 02, 2025 14:24 by jts5573

  • Added Creator Suchismita Sarker

    January 02, 2025 14:24 by jts5573

  • Added Creator Tatiana Kuznetsova

    January 02, 2025 14:24 by jts5573

  • Added Creator Saugata Sarker

    January 02, 2025 14:24 by jts5573

  • Added Creator Xin Li

    January 02, 2025 14:24 by jts5573

  • Added Creator Matthew R. Barone

    January 02, 2025 14:24 by jts5573

  • Added Creator Xiaoshan Xu

    January 02, 2025 14:24 by jts5573

  • Added Creator John W. Freeland

    January 02, 2025 14:24 by jts5573

  • Added Creator Roman Engel-Herbert

    January 02, 2025 14:24 by jts5573

  • Added Creator Aaron M. Lindenberg

    January 02, 2025 14:24 by jts5573

  • Added Creator Andrej Singer

    January 02, 2025 14:24 by jts5573

  • Added Creator Susan E Trolier-Mckinstry

    January 02, 2025 14:24 by jts5573

  • Added Creator David A. Muller

    January 02, 2025 14:24 by jts5573

  • Added Creator Gian-Marco Rignanese

    January 02, 2025 14:24 by jts5573

  • Added Creator Salva Salmani-Rezaie

    January 02, 2025 14:24 by jts5573

  • Added Creator Vladmir A. Stoica

    January 02, 2025 14:24 by jts5573

  • Added Creator Alexei Gruverman

    January 02, 2025 14:24 by jts5573

  • Added Creator Long-Qing Chen

    January 02, 2025 14:24 by jts5573

  • Added Creator Darrell G. Schlom

    January 02, 2025 14:24 by jts5573

  • Added Creator Venkatraman Gopalan

    January 02, 2025 14:24 by jts5573

  • Added AccessibleCopy_Colossal_Strain_Turning_of_Ferrroelectric.pdf

    January 21, 2025 10:53 by jts5573

  • Added AccessibleCopy_Supporting_Information_for_Colossal_Strain_p34.pdf

    January 23, 2025 09:58 by jts5573

  • Deleted Main text_KNbO3 strain tuning.pdf

    February 21, 2025 17:45 by sco3

  • Deleted SI KNbO3 manuscript.pdf

    February 21, 2025 17:45 by sco3

  • Published

    March 20, 2025 11:54 by jts5573