Influence of Ta5+ content on the crystallographic structure and electrical properties of [001]PC-oriented (Li,Na,K)(Nb,Ta)O3 single crystals

Hairui Liu, Philippe Veber, Jurij Koruza, Daniel Rytz, Michael Josse, Jürgen Rödel, Mario Maglione

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A series of centimeter-sized lead-free piezoelectric Li+- and Ta5+-modified (Na,K)NbO3 single crystals with an ABO3 perovskite structure was successfully grown by the top-seeded solution growth method. Effective segregation of the elements was considered in order to further develop the growth of Li+- and Ta5+-modified (Na,K)NbO3 single crystals. The crystallographic structure and electrical behaviour along the [001]PC orientation were studied. X-ray diffraction, Raman spectroscopy and dielectric studies reveal that the increase in Ta5+ content reduces the orthorhombic-tetragonal phase transition. Bipolar and unipolar strain curves were investigated at 2 kV mm-1. The highest bipolar and unipolar strains associated with a large-signal piezoelectric constant of 368 pm V-1 were achieved for Li0.02Na0.626K0.354Nb0.808Ta0.192O3. The asymmetric bipolar strain curves were observed and related to the existence of internal bias fields induced by (V′A-VO) defect dipoles, which were created during the crystal growth process.

Original languageEnglish (US)
Pages (from-to)2081-2088
Number of pages8
JournalCrystEngComm
Volume18
Issue number12
DOIs
StatePublished - Jan 1 2016

Fingerprint

Electric properties
electrical properties
Single crystals
single crystals
curves
crystal growth
Raman spectroscopy
dipoles
Crystallization
Crystal growth
Perovskite
defects
Lead
Phase transitions
diffraction
X ray diffraction
Defects
x rays
perovskite

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Liu, Hairui ; Veber, Philippe ; Koruza, Jurij ; Rytz, Daniel ; Josse, Michael ; Rödel, Jürgen ; Maglione, Mario. / Influence of Ta5+ content on the crystallographic structure and electrical properties of [001]PC-oriented (Li,Na,K)(Nb,Ta)O3 single crystals. In: CrystEngComm. 2016 ; Vol. 18, No. 12. pp. 2081-2088.
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Influence of Ta5+ content on the crystallographic structure and electrical properties of [001]PC-oriented (Li,Na,K)(Nb,Ta)O3 single crystals. / Liu, Hairui; Veber, Philippe; Koruza, Jurij; Rytz, Daniel; Josse, Michael; Rödel, Jürgen; Maglione, Mario.

In: CrystEngComm, Vol. 18, No. 12, 01.01.2016, p. 2081-2088.

Research output: Contribution to journalArticle

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AU - Rytz, Daniel

AU - Josse, Michael

AU - Rödel, Jürgen

AU - Maglione, Mario

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N2 - A series of centimeter-sized lead-free piezoelectric Li+- and Ta5+-modified (Na,K)NbO3 single crystals with an ABO3 perovskite structure was successfully grown by the top-seeded solution growth method. Effective segregation of the elements was considered in order to further develop the growth of Li+- and Ta5+-modified (Na,K)NbO3 single crystals. The crystallographic structure and electrical behaviour along the [001]PC orientation were studied. X-ray diffraction, Raman spectroscopy and dielectric studies reveal that the increase in Ta5+ content reduces the orthorhombic-tetragonal phase transition. Bipolar and unipolar strain curves were investigated at 2 kV mm-1. The highest bipolar and unipolar strains associated with a large-signal piezoelectric constant of 368 pm V-1 were achieved for Li0.02Na0.626K0.354Nb0.808Ta0.192O3. The asymmetric bipolar strain curves were observed and related to the existence of internal bias fields induced by (V′A-VO) defect dipoles, which were created during the crystal growth process.

AB - A series of centimeter-sized lead-free piezoelectric Li+- and Ta5+-modified (Na,K)NbO3 single crystals with an ABO3 perovskite structure was successfully grown by the top-seeded solution growth method. Effective segregation of the elements was considered in order to further develop the growth of Li+- and Ta5+-modified (Na,K)NbO3 single crystals. The crystallographic structure and electrical behaviour along the [001]PC orientation were studied. X-ray diffraction, Raman spectroscopy and dielectric studies reveal that the increase in Ta5+ content reduces the orthorhombic-tetragonal phase transition. Bipolar and unipolar strain curves were investigated at 2 kV mm-1. The highest bipolar and unipolar strains associated with a large-signal piezoelectric constant of 368 pm V-1 were achieved for Li0.02Na0.626K0.354Nb0.808Ta0.192O3. The asymmetric bipolar strain curves were observed and related to the existence of internal bias fields induced by (V′A-VO) defect dipoles, which were created during the crystal growth process.

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