The Dielectric Studies of Ferroelectric [NH_2(CH_3)_2]_3Sb_2Cl_9 Crystals under Moderate Pressure

• Authors: M. Zdanowska-Frączek , M. Olszewski , Z. Frączek , R. Jakubas
• Languages of publication: EN

Abstracts

EN

The effect of pressure on the dielectric properties of [NH_2(CH_3)_2]_3Sb_2Cl_9 crystal was analyzed for a few values of hydrostatic pressure within the range from 0.1 MPa to 300 MPa and for temperatures from the range of 220-350 K. The measuring frequency was 1 kHz. The pressure-temperature phase diagram obtained was nonlinear. The temperature dielectric permittivity anomalies related to the paraelectric-ferroelectric phase transition temperature (T_c) gradually increase up to 66 MPa and then decrease with subsequent increase in pressure. The character of the temperature dielectric permittivity anomalies, typical of the continuous ferroelectric transition, remains unchanged with increasing pressure. Additionally, the pressure dependences of the Curie-Weiss constants for the crystal in paraelectric (C_+) and ferroelectric (C_-) phases were evaluated and discussed. The results indicated a complex mechanism of the ferroelectric phase transition.

Keywords

EN

71.45.Gm; 77.84.Fa; 77.22.Ch; 77.80.Bh

Discipline

• 77.84.Fa: KDP- and TGS-type crystals
• 77.22.Ch: Permittivity (dielectric function)(for low-permittivity dielectric films, see 77.55.Bh; for high-permittivity gate dielectric films, 77.55.D-)
• 71.45.Gm: Exchange, correlation, dielectric and magnetic response functions, plasmons

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 3
• Pages: 549-556

Dates

published

2007-09

received

2007-08-24

(unknown)

2007-09-20

Contributors

author

M. Zdanowska-Frączek

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

M. Olszewski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

Z. Frączek

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

R. Jakubas

• Faculty of Chemistry, Wrocław University, Joliot-Curie 14, 50-385 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.112.549