Polar state in freestanding strontium titanate nanoparticles

Trevor A. Tyson, Tian Yu, Mark Croft, Megan E. Scofield, Dara Bobb-Semple, Jing Tao, Cherno Jaye, Daniel Fischer, Stanislaus S. Wong

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Monodispersed strontium titanate nanoparticles were prepared and studied in detail. It is found that ∼10-nm as-prepared stoichiometric nanoparticles are in a polar structural state (possibly with ferroelectric properties) over a broad temperature range. A tetragonal structure, with possible reduction of the electronic hybridization, is found as the particle size is reduced. In the 10-nm particles, no change in the local Ti-off centering is seen between 20 and 300-K. The results indicate that nanoscale motifs of SrTiO3 may be utilized in data storage as assembled nano-particle arrays in applications where chemical stability, temperature stability, and low toxicity are critical issues.

Original languageEnglish (US)
Article number091901
JournalApplied Physics Letters
Volume105
Issue number9
DOIs
StatePublished - Sep 1 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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