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@article{1641484,
author = {Kriegner, D. and Springholz, G. and Richter, C. and Filet, N. and Muller, E. and Capron, M. and Berger, H. and Holý, Václav and Dil, J.H. and Krempasky, J.},
article_location = {BASEL},
article_number = {7},
doi = {http://dx.doi.org/10.3390/cryst9070335},
keywords = {self-polarization; ferroelectricity; microstructure; EXAFS; PFM; anomalous diffraction; thin films; single crystals},
language = {eng},
issn = {2073-4352},
journal = {CRYSTALS},
title = {Ferroelectric Self-Poling in GeTe Films and Crystals},
url = {https://www.mdpi.com/2073-4352/9/7/335},
volume = {9},
year = {2019}
}
TY - JOUR
ID - 1641484
AU - Kriegner, D. - Springholz, G. - Richter, C. - Filet, N. - Muller, E. - Capron, M. - Berger, H. - Holý, Václav - Dil, J.H. - Krempasky, J.
PY - 2019
TI - Ferroelectric Self-Poling in GeTe Films and Crystals
JF - CRYSTALS
VL - 9
IS - 7
SP - 1-15
EP - 1-15
PB - MDPI
SN - 20734352
KW - self-polarization
KW - ferroelectricity
KW - microstructure
KW - EXAFS
KW - PFM
KW - anomalous diffraction
KW - thin films
KW - single crystals
UR - https://www.mdpi.com/2073-4352/9/7/335
L2 - https://www.mdpi.com/2073-4352/9/7/335
N2 - Ferroelectric materials are used in actuators or sensors because of their non-volatile macroscopic electric polarization. GeTe is the simplest known diatomic ferroelectric endowed with exceedingly complex physics related to its crystalline, amorphous, thermoelectric, and-fairly recently discovered-topological properties, making the material potentially interesting for spintronics applications. Typically, ferroelectric materials possess random oriented domains that need poling to achieve macroscopic polarization. By using X-ray absorption fine structure spectroscopy complemented with anomalous diffraction and piezo-response force microscopy, we investigated the bulk ferroelectric structure of GeTe crystals and thin films. Both feature multi-domain structures in the form of oblique domains for films and domain colonies inside crystals. Despite these multi-domain structures which are expected to randomize the polarization direction, our experimental results show that at room temperature there is a preferential ferroelectric order remarkably consistent with theoretical predictions from ideal GeTe crystals. This robust self-poled state has high piezoelectricity and additional poling reveals persistent memory effects.
ER -
KRIEGNER, D., G. SPRINGHOLZ, C. RICHTER, N. FILET, E. MULLER, M. CAPRON, H. BERGER, Václav HOLÝ, J.H. DIL a J. KREMPASKY. Ferroelectric Self-Poling in GeTe Films and Crystals. \textit{CRYSTALS}. BASEL: MDPI, 2019, roč.~9, č.~7, s.~1-15. ISSN~2073-4352. Dostupné z: https://dx.doi.org/10.3390/cryst9070335.
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