Electric-field-tunable mechanical properties of relaxor ferroelectric single crystal measured by nanoindentation

Hao Zhou; Yongmao Pei; Faxin Li; Haosu Luo; Daining Fang

doi:10.1063/1.4865773

Electric-field-tunable mechanical properties of relaxor ferroelectric single crystal measured by nanoindentation

Hao Zhou, Yongmao Pei^*, Faxin Li, Haosu Luo, Daining Fang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

Electric field dependent mechanical properties of relaxor ferroelectric material Pb(Mn_1/3Nb_2/3)O₃-PbTiO₃ are investigated with the nanoindentation technique. Giant electric-field-tunable apparent elastic modulus (up to -39%), hardness (-9% to 20%), and energy dissipation (up to -13%) are reported. Based on experimental data, a characterization method of electromechanical coupled nanoindentation is proposed. In this method, an electric field tunable scaling relationship among elastic modulus, hardness, and indentation work for ferroelectric materials can be determined. In addition, this method can be used to obtain the electric-field-dependent elastic modulus and hardness, and avoid the estimate of contact area in the Oliver-Pharr method. Finally, the different effects on elastic modulus between positive and negative electric fields can be explained by the flexoelectric effect.

Original language	English
Article number	061904
Journal	Applied Physics Letters
Volume	104
Issue number	6
DOIs	https://doi.org/10.1063/1.4865773
Publication status	Published - 2 Oct 2014
Externally published	Yes

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title = "Electric-field-tunable mechanical properties of relaxor ferroelectric single crystal measured by nanoindentation",

abstract = "Electric field dependent mechanical properties of relaxor ferroelectric material Pb(Mn1/3Nb2/3)O3-PbTiO3 are investigated with the nanoindentation technique. Giant electric-field-tunable apparent elastic modulus (up to -39%), hardness (-9% to 20%), and energy dissipation (up to -13%) are reported. Based on experimental data, a characterization method of electromechanical coupled nanoindentation is proposed. In this method, an electric field tunable scaling relationship among elastic modulus, hardness, and indentation work for ferroelectric materials can be determined. In addition, this method can be used to obtain the electric-field-dependent elastic modulus and hardness, and avoid the estimate of contact area in the Oliver-Pharr method. Finally, the different effects on elastic modulus between positive and negative electric fields can be explained by the flexoelectric effect.",

author = "Hao Zhou and Yongmao Pei and Faxin Li and Haosu Luo and Daining Fang",

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T1 - Electric-field-tunable mechanical properties of relaxor ferroelectric single crystal measured by nanoindentation

AU - Zhou, Hao

AU - Pei, Yongmao

AU - Li, Faxin

AU - Luo, Haosu

AU - Fang, Daining

PY - 2014/10/2

Y1 - 2014/10/2

N2 - Electric field dependent mechanical properties of relaxor ferroelectric material Pb(Mn1/3Nb2/3)O3-PbTiO3 are investigated with the nanoindentation technique. Giant electric-field-tunable apparent elastic modulus (up to -39%), hardness (-9% to 20%), and energy dissipation (up to -13%) are reported. Based on experimental data, a characterization method of electromechanical coupled nanoindentation is proposed. In this method, an electric field tunable scaling relationship among elastic modulus, hardness, and indentation work for ferroelectric materials can be determined. In addition, this method can be used to obtain the electric-field-dependent elastic modulus and hardness, and avoid the estimate of contact area in the Oliver-Pharr method. Finally, the different effects on elastic modulus between positive and negative electric fields can be explained by the flexoelectric effect.

AB - Electric field dependent mechanical properties of relaxor ferroelectric material Pb(Mn1/3Nb2/3)O3-PbTiO3 are investigated with the nanoindentation technique. Giant electric-field-tunable apparent elastic modulus (up to -39%), hardness (-9% to 20%), and energy dissipation (up to -13%) are reported. Based on experimental data, a characterization method of electromechanical coupled nanoindentation is proposed. In this method, an electric field tunable scaling relationship among elastic modulus, hardness, and indentation work for ferroelectric materials can be determined. In addition, this method can be used to obtain the electric-field-dependent elastic modulus and hardness, and avoid the estimate of contact area in the Oliver-Pharr method. Finally, the different effects on elastic modulus between positive and negative electric fields can be explained by the flexoelectric effect.

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Electric-field-tunable mechanical properties of relaxor ferroelectric single crystal measured by nanoindentation

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