Hardening behavior of Mn-modified KNN-BT thick films fabricated by aerosol deposition

Guifang Han, Shashank Priya, Jungho Ryu, Woon Ha Yoon, Jong Jin Choi, Byung Dong Hahn, Dong Soo Park

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Highly dense, 30 μm-thick 0.95(K0.5Na0.5)NbO 3-0.05BaTiO3 (KNN-BT) lead-free films were successfully fabricated on alumina substrate by aerosol deposition (AD) and the effect of Mn doping (0 mol%, 0.5 mol% and 1.0 mol%) on the film properties was investigated. It was found that low field dielectric constant decreases by 36% for 0.5 mol% Mn doping and 42% for 1 mol% Mn doping. The loss factor was found to reduce by 19% for 0.5 mol% Mn doping and 43% for 1 mol% Mn doping. Based on the high field polarization-electric field measurement, we demonstrate that Mn induces hardening in KNN-BT thick films. The hardening is believed to be due to the pinning of the domains by dipolar defects at domain boundaries.

Original languageEnglish (US)
Pages (from-to)278-281
Number of pages4
JournalMaterials Letters
Volume65
Issue number2
DOIs
StatePublished - Jan 31 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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