5 years ago

Lead-Free Polycrystalline Ferroelectric Nanowires with Enhanced Curie Temperature

Lead-Free Polycrystalline Ferroelectric Nanowires with Enhanced Curie Temperature
Canlin Ou, Anuja Datta, Sohini Kar-Narayan, Marco Fornari, Yonatan Calahorra, Suman-Lata Sahonta, Pedro E. Sanchez-Jimenez, Rabih Al Rahal Al Orabi
Ferroelectrics are important technological materials with wide-ranging applications in electronics, communication, health, and energy. While lead-based ferroelectrics have remained the predominant mainstay of industry for decades, environmentally friendly lead-free alternatives are limited due to relatively low Curie temperatures (T C) and/or high cost in many cases. Efforts have been made to enhance T C through strain engineering, often involving energy-intensive and expensive fabrication of thin epitaxial films on lattice-mismatched substrates. Here, a relatively simple and scalable sol–gel synthesis route to fabricate polycrystalline (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 nanowires within porous templates is presented, with an observed enhancement of T C up to ≈300 °C as compared to ≈90 °C in the bulk. By combining experiments and theoretical calculations, this effect is attributed to the volume reduction in the template-grown nanowires that modifies the balance between different structural instabilities. The results offer a cost-effective solution-based approach for strain-tuning in a promising lead-free ferroelectric system, thus widening their current applicability. Nanowires of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCT-0.5BZT) are grown using a template-aided sol–gel synthesis route. These are found to have enhanced ferroelectric Curie temperature (T C) of ≈300 °C as compared to ≈90 °C in the bulk. BCT-0.5BZT in the bulk has limited applicability due to its room-temperature T C. The studies thus offer a cost-effective solution, by achieving enhanced T C via strain-tuning in BCT-0.5BZT nanowires.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adfm.201701169

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.