Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/48264
Título: | Optical nonlinearity and piezoelectricity in 2,4,6-trimethylpyridinium perchlorate |
Autor(es): | Wojtas, M. Czupinski, O. Tylczynski, Z. Isakov, Dmitry Belsley, M. Jakubas, R. |
Palavras-chave: | Perchlorate Phase transition SHG Piezoelectric |
Data: | 8-Jul-2014 |
Editora: | Elsevier 1 |
Revista: | Chemical Physics |
Resumo(s): | [(CH3)(3)C5H2NH][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)(3)C5H2NH][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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/48264 |
DOI: | 10.1016/j.chemphys.2014.06.018 |
ISSN: | 0301-0104 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FAMO - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
ChemPhys_Optical nonlinearity and piezoelectricity in 246-trimethylpyridinium perchlorate.pdf Acesso restrito! | 1,56 MB | Adobe PDF | Ver/Abrir |