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Kolekcje
Inne
Optical nonlinearity and piezoelectricity in 2,4,6-trimethylpyridinium perchlorate.
Autorzy
Rok wydania
2014
Czasopismo
Numer woluminu
441
Strony
59-65
DOI
10.1016/j.chemphys.2014.06.018
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
[(CH3)3C5H2NH][ClO4] exhibits rich polymorphism, it undergoes four structural phase transitions: from phases I to II at 356/327 K (heating/cooling), II–III at 346/326, III–IV at 226 K and IV–V at 182/170 K. [(CH3)3C5H2NH][ClO4] reveals a strong optical nonlinearity over a wide temperature region with the SHG efficiency comparable to that of KDP. The piezoelectric properties were studied macroscopically by series resonance method over the phases III, IV and V as well as microscopically by means of piezoelectric force microscopy (PFM) in ambient conditions. One of the piezoelectric module at phase transition point at 226 K drops to the value twice smaller than in room temperature what up to now was not encountered in literature. Moreover the ferroelastic phase transition IV–V was observed by means of polarizing optical microscope. The choice of the point group of phase I (Pmmm) was confirmed by the SHG measurements. The updated phase diagram is presented.
Słowa kluczowe
perchlorate, phase transtion, SHG, Piezoelectric
Adres publiczny
http://dx.doi.org/10.1016/j.chemphys.2014.06.018
Strona internetowa wydawcy
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