Ultra-low coercive field of improper ferroelectric Ca3Ti2O7epitaxial thin films

X. Li; L. Yang; C. F. Li; M. F. Liu; Z. Fan; Y. L. Xie; C. L. Lu; L. Lin; Z. B. Yan; Z. Zhang; Jiyan Dai; J. M. Liu; S. W. Cheong

doi:10.1063/1.4974217

Ultra-low coercive field of improper ferroelectric Ca₃Ti₂O₇epitaxial thin films

X. Li, L. Yang, C. F. Li, M. F. Liu, Z. Fan, Y. L. Xie, C. L. Lu, L. Lin, Z. B. Yan, Z. Zhang, Jiyan Dai, J. M. Liu, S. W. Cheong

Research output: Journal article publication › Journal article › Academic research › peer-review

25 Citations (Scopus)

Abstract

ï¿½ 2017 Author(s). Hybrid improper ferroelectrics have their electric polarization generated by two or more combined non-ferroelectric structural distortions, such as the rotation and tilting of Ti-O octahedral in the Ca3Ti2O7(CTO) family. In this work, we prepare the high quality (010)-oriented CTO thin films on (110) SrTiO3(STO) substrates by pulsed laser deposition. The good epitaxial growth of the CTO thin films on the substrates with the interfacial epitaxial relationship of [001]CTO//[001]STO and [100]CTO//[-110]STO is revealed. The in-plane ferroelectric hysteresis unveils an ultralow coercive field of ∼5 kV/cm even at low temperature, nearly two orders of magnitude lower than that of bulk CTO single crystals. The huge difference between the epitaxial thin films and bulk crystals is most likely due to the lattice imperfections in the thin films rather than substrate induced lattice strains, suggesting high sensitivity of the ferroelectric properties to lattice defects.

Original language	English
Article number	042901
Journal	Applied Physics Letters
Volume	110
Issue number	4
DOIs	https://doi.org/10.1063/1.4974217
Publication status	Published - 23 Jan 2017

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

More information

10.1063/1.4974217

Cite this

@article{92f29cbdeea74efca520ef92c51c7d2d,

title = "Ultra-low coercive field of improper ferroelectric Ca3Ti2O7epitaxial thin films",

abstract = "{\"i}¿½ 2017 Author(s). Hybrid improper ferroelectrics have their electric polarization generated by two or more combined non-ferroelectric structural distortions, such as the rotation and tilting of Ti-O octahedral in the Ca3Ti2O7(CTO) family. In this work, we prepare the high quality (010)-oriented CTO thin films on (110) SrTiO3(STO) substrates by pulsed laser deposition. The good epitaxial growth of the CTO thin films on the substrates with the interfacial epitaxial relationship of [001]CTO//[001]STO and [100]CTO//[-110]STO is revealed. The in-plane ferroelectric hysteresis unveils an ultralow coercive field of ∼5 kV/cm even at low temperature, nearly two orders of magnitude lower than that of bulk CTO single crystals. The huge difference between the epitaxial thin films and bulk crystals is most likely due to the lattice imperfections in the thin films rather than substrate induced lattice strains, suggesting high sensitivity of the ferroelectric properties to lattice defects.",

author = "X. Li and L. Yang and Li, {C. F.} and Liu, {M. F.} and Z. Fan and Xie, {Y. L.} and Lu, {C. L.} and L. Lin and Yan, {Z. B.} and Z. Zhang and Jiyan Dai and Liu, {J. M.} and Cheong, {S. W.}",

year = "2017",

month = jan,

day = "23",

doi = "10.1063/1.4974217",

language = "English",

volume = "110",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "4",

}

TY - JOUR

T1 - Ultra-low coercive field of improper ferroelectric Ca3Ti2O7epitaxial thin films

AU - Li, X.

AU - Yang, L.

AU - Li, C. F.

AU - Liu, M. F.

AU - Fan, Z.

AU - Xie, Y. L.

AU - Lu, C. L.

AU - Lin, L.

AU - Yan, Z. B.

AU - Zhang, Z.

AU - Dai, Jiyan

AU - Liu, J. M.

AU - Cheong, S. W.

PY - 2017/1/23

Y1 - 2017/1/23

N2 - ï¿½ 2017 Author(s). Hybrid improper ferroelectrics have their electric polarization generated by two or more combined non-ferroelectric structural distortions, such as the rotation and tilting of Ti-O octahedral in the Ca3Ti2O7(CTO) family. In this work, we prepare the high quality (010)-oriented CTO thin films on (110) SrTiO3(STO) substrates by pulsed laser deposition. The good epitaxial growth of the CTO thin films on the substrates with the interfacial epitaxial relationship of [001]CTO//[001]STO and [100]CTO//[-110]STO is revealed. The in-plane ferroelectric hysteresis unveils an ultralow coercive field of ∼5 kV/cm even at low temperature, nearly two orders of magnitude lower than that of bulk CTO single crystals. The huge difference between the epitaxial thin films and bulk crystals is most likely due to the lattice imperfections in the thin films rather than substrate induced lattice strains, suggesting high sensitivity of the ferroelectric properties to lattice defects.

AB - ï¿½ 2017 Author(s). Hybrid improper ferroelectrics have their electric polarization generated by two or more combined non-ferroelectric structural distortions, such as the rotation and tilting of Ti-O octahedral in the Ca3Ti2O7(CTO) family. In this work, we prepare the high quality (010)-oriented CTO thin films on (110) SrTiO3(STO) substrates by pulsed laser deposition. The good epitaxial growth of the CTO thin films on the substrates with the interfacial epitaxial relationship of [001]CTO//[001]STO and [100]CTO//[-110]STO is revealed. The in-plane ferroelectric hysteresis unveils an ultralow coercive field of ∼5 kV/cm even at low temperature, nearly two orders of magnitude lower than that of bulk CTO single crystals. The huge difference between the epitaxial thin films and bulk crystals is most likely due to the lattice imperfections in the thin films rather than substrate induced lattice strains, suggesting high sensitivity of the ferroelectric properties to lattice defects.

UR - http://www.scopus.com/inward/record.url?scp=85010299066&partnerID=8YFLogxK

U2 - 10.1063/1.4974217

DO - 10.1063/1.4974217

M3 - Journal article

SN - 0003-6951

VL - 110

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

M1 - 042901

ER -

Ultra-low coercive field of improper ferroelectric Ca₃Ti₂O₇epitaxial thin films

Abstract

ASJC Scopus subject areas

More information

Other files and links

Fingerprint

Cite this