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In Situ 3D Observation of the Domain Wall Dynamics in a Triglycine Sulfate Single Crystal upon Ferroelectric Phase Transition
Author(s) -
Wehmeier Lukas,
Kämpfe Thomas,
Haußmann Alexander,
Eng Lukas M.
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201700267
Subject(s) - triglycine sulfate , ferroelectricity , phase transition , condensed matter physics , materials science , curie temperature , in situ , annealing (glass) , dielectric , domain (mathematical analysis) , phase (matter) , ferroics , second harmonic generation , single crystal , crystallography , optics , chemistry , physics , quantum phase transition , optoelectronics , ferromagnetism , mathematics , composite material , mathematical analysis , organic chemistry , laser , quantum critical point
We present the first in situ 3D observation of domain wall dynamics close to a ferroelectric–paraelectric phase transition, which we obtain via second‐harmonic generation microscopy (SHGM). Showing a pure second‐order phase transition at its Curie temperature of 49 °C, triglycine sulfate (TGS) is a model ferroelectric material to study such phase transitions. After annealing, in TGS various qualitatively different domain patterns, e.g., stripes or small lenticular domains, have been reported so far. By applying SHGM, we can show that these findings do not necessarily contradict each other. In fact, qualitatively different domain patterns may coexist in the same TGS sample at the same time.