Incipient ferroelectricity in 2.3% tensile-strained CaMnO3 films

T. Günter; E. Bousquet; A. David; Ph. Boullay; Ph. Ghosez; W. Prellier; M. Fiebig

doi:10.1103/PhysRevB.85.214120

Incipient ferroelectricity in 2.3% tensile-strained CaMnO3 films

Materials Science 2015-06-05 v1

Authors: T. Günter , E. Bousquet , A. David , Ph. Boullay , Ph. Ghosez , W. Prellier , M. Fiebig

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Abstract

Epitaxial CaMnO3 films grown with 2.3% tensile strain on (001)-oriented LaAlO3 substrates are found to be incipiently ferroelectric below 25 K. Optical second harmonic generation (SHG) was used for the detection of the incipient polarization. The SHG analysis reveals that CaMnO3 crystallites with in-plane orientation of the orthorhombic b axis contribute to an electric polarization oriented along the orthorhombic a (resp.\ c) axis in agreement with the predictions from density functional calculations.

Keywords

incipient ferroelectricity CaMnO3 tensile strain second harmonic generation density functional calculations epitaxial films

Cite

@article{arxiv.1205.1623,
  title  = {Incipient ferroelectricity in 2.3% tensile-strained CaMnO3 films},
  author = {T. Günter and E. Bousquet and A. David and Ph. Boullay and Ph. Ghosez and W. Prellier and M. Fiebig},
  journal= {arXiv preprint arXiv:1205.1623},
  year   = {2015}
}

Incipient ferroelectricity in 2.3% tensile-strained CaMnO3 films

Abstract

Keywords

Cite

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