Repozytorium
Wyszukaj
Kolekcje
Inne
Ferroelectric properties of [4-NH2C5H4NH][SbCl4].
Autorzy
Rok wydania
2003
Czasopismo
Numer woluminu
67
Strony
024103/1-024103/6
DOI
10.1103/PhysRevB.67.024103
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
A ferroelectric crystal@4-NH2C5H4NH#@SbCl4#has been synthesized. The x-ray diffraction studies indicatethat it is made of polyanionic chains of ( SbCl42)nforming a tunnel-like structure and the 4-aminopyridiniumcations connected via weak hydrogen bonds to the chlorine atoms. The x-ray and differential scanning calo-rimetrystudiesshowthatthecrystalundergoesacomplexsequenceofphasetransitions:P21/c$240/245 K(Cc)$248.5/250 KCc$270.5/271 KC2/c$304/304 KC2/c.Thepyroelectricmeasurementsrevealthat@4-NH2C5H4NH#@SbCl4#becomes ferroelectric below 270.5 K with the spontaneous polarization of the orderof 3.5 mC/m2measured along the@102#direction. The dielectric results confirm the order-disorder nature of theparaelectric-ferroelectric phase transition. The dynamics of the 4-aminopyridinium cations plays an essentialrole in the ferroelectric phase transition mechanism.
Adres publiczny
Podobne publikacje
Structure and properties of [2-NH2C5H4NH][SbCl4] and [2-NH2C5H4NH][SbBr4].
Kulicka Beata, Jakubas Ryszard, Bator Grażyna , Ciunik Zbigniew, Medycki Wojciech
Molecular dynamics in ferroelectric 4-aminopyridinium tetrachloroantimonate(III), [4-NH2C5H4NH][SbCl4].
Medycki Wojciech, Holderna-Natkaniec K., Swiergiel J., Jakubas Ryszard
The pressure influence on the incommensurate-commensurate ferroelectric phase transition in [4-NH2C5H4NH][SbCl4].
Zdanowska-Frączek M., Jakubas Ryszard