High-pressure structural and dielectric studies of the phase transition in lithium thallium tartrate monohydrate.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F02%3A49020063" target="_blank" >RIV/61389005:_____/02:49020063 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

High-pressure structural and dielectric studies of the phase transition in lithium thallium tartrate monohydrate.

Original language description

We have investigated the structure lithium thallium tartrate monchydrate (LiT1C4H4O6H2O)-H-.) single crystal by means of neutron diffraction at a hydrostatic pressure of 120 MPa. Atomic positions including those of hydrogen atoms have been refined for the orthorhombic paraelectric phase (P2(1)2(1)2) at 36 K and for the monoclinic ferroelectric (FE) phase (P2(1)11) at 6 K. Moreover, our dielectric results, confirmed by the temperature variation of the monoclinic splitting, provide evidence for the existence of an intermediate FE phase in the temperature range between T-c`= 24 K and T -c = 34 K. The two FE phases are propably isomorphous but differ in their degree of monoclinic distortion and in their value of the piezoelectric coefficients. Both phase transition temperatures drop with decreasing hydrostatic pressure and only a single FE phase is observed below 11 K at ambient pressure. The spontaneous polarization appears along the crystallographic axis a and, according to our structure

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

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Project

<a href="/en/project/KSK1048102" target="_blank" >KSK1048102: Fundamental physical laws of microworld and macroworld, the behaviour of matter and radiation</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2002

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Physics. Condensed Matter

ISSN

0953-8984

e-ISSN

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Volume of the periodical

14

Issue of the periodical within the volume

15

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

4045-4055

UT code for WoS article

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EID of the result in the Scopus database

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