TY - JOUR
T1 - Temperature-Dependent Evolution of Crystallographic and Domain Structures in (K,Na,Li)(Ta,Nb)O3 Piezoelectric Single Crystals
AU - Liu, Hairui
AU - Veber, Philippe
AU - Zintler, Alexander
AU - Molina-Luna, Leopoldo
AU - Rytz, Daniel
AU - Maglione, Mario
AU - Koruza, Jurij
N1 - Funding Information:
Manuscript received March 11, 2018; accepted June 4, 2018. Date of publication June 7, 2018; date of current version August 29, 2018. This work was supported in part by Erasmus Mundus International Doctoral School IDS-FunMat under Project 2013-07 and in part by the German–French Doctoral School. (Corresponding author: Jurij Koruza.) H. Liu was with the Department of Materials and Earth Sciences, Technische Universität Darmstadt, 64287 Darmstadt, Germany. She is now with the Center for Energy Harvesting Materials and Systems, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA 24061 USA (e-mail: liuhrxc. . ail.com).
Publisher Copyright:
© 1986-2012 IEEE.
PY - 2018/9
Y1 - 2018/9
N2 - (K,Na)NbO3-based ferroelectric single crystals have recently undergone a substantial development, resulting in improved crystal quality and large piezoelectric coefficients, exceeding 700 pC/N, over a broad temperature range. However, further development necessitates a detailed understanding of the mechanisms defining the domain structure and its temperature evolution. This paper presents the investigation into the crystallographic structure and domain configurations of a (K,Na,Li)(Ta,Nb)O3 single crystal over a broad temperature range. The crystal was grown by the submerged-seed solution growth technique and investigated using in situ transmission electron microscopy, X-ray diffraction, dielectric measurements, and polarized light microscopy. The lattice distortion, structural phase transitions, and domain configurations are reported. A transition from the lamellar orthorhombic to the rectangular tetragonal domain structure is observed upon heating. Moreover, the milky optical appearance of the crystal was investigated and found to result from the presence of regions with different domain configurations and domain sizes. The formation of these regions is related to the growth defects, which govern the domain formation when cooling below the Curie temperature.
AB - (K,Na)NbO3-based ferroelectric single crystals have recently undergone a substantial development, resulting in improved crystal quality and large piezoelectric coefficients, exceeding 700 pC/N, over a broad temperature range. However, further development necessitates a detailed understanding of the mechanisms defining the domain structure and its temperature evolution. This paper presents the investigation into the crystallographic structure and domain configurations of a (K,Na,Li)(Ta,Nb)O3 single crystal over a broad temperature range. The crystal was grown by the submerged-seed solution growth technique and investigated using in situ transmission electron microscopy, X-ray diffraction, dielectric measurements, and polarized light microscopy. The lattice distortion, structural phase transitions, and domain configurations are reported. A transition from the lamellar orthorhombic to the rectangular tetragonal domain structure is observed upon heating. Moreover, the milky optical appearance of the crystal was investigated and found to result from the presence of regions with different domain configurations and domain sizes. The formation of these regions is related to the growth defects, which govern the domain formation when cooling below the Curie temperature.
KW - (K,Na,Li)(Ta,Nb)O
KW - Domains
KW - ferroelectric
KW - in situ transmission electron microscopy (TEM)
KW - lattice distortion
KW - lead free
KW - piezoelectric
UR - http://www.scopus.com/inward/record.url?scp=85048510757&partnerID=8YFLogxK
U2 - 10.1109/TUFFC.2018.2844801
DO - 10.1109/TUFFC.2018.2844801
M3 - Article
C2 - 29994202
AN - SCOPUS:85048510757
SN - 0885-3010
VL - 65
SP - 1508
EP - 1516
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 9
M1 - 8375145
ER -