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Nature Research, Scientific Reports, 1(4), 2014

DOI: 10.1038/srep06020

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Dielectric Characterization of a Nonlinear Optical Material

Journal article published in 2014 by P. Lunkenheimer, S. Krohns, F. Gemander, W. W. Schmahl, A. Loidl ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Batisite was reported to be a nonlinear optical material showing second harmonic generation. Using dielectric spectroscopy and polarization measurements, we provide a thorough investigation of the dielectric and charge-transport properties of this material. Batisite shows the typical characteristics of a linear lossy dielectric. No evidence for ferro- or antiferroelectric polarization is found. As the second-harmonic generation observed in batisite points to a non-centrosymmetric structure, this material is piezoelectric, but most likely not ferroelectric. In addition, we found evidence for hopping charge transport of localized charge carriers and a relaxational process at low temperatures.