Electrical properties of ferroelectric 1,4-diaminobutane zinc formate crystals under high hydrostatic pressure.

ORAL

Abstract

1,4-diaminobutane zinc formate is an example of metal organic frameworks, MOF, which possesses a nicolite-type structure. This compound is characterized by ordered pore structure, formed by a specific arrangement of atoms formed by coordinating bonds between zinc atoms and formate ligands. Due to its multiferroic properties this compound as well as other MOFs can be applied in memory components.
The electric impedance was measured by means of broadband dielectric spectroscopy (BDS). In the studied crystal one relaxation process was observed. At ambient pressure the phase transition was registered at T = 243 K. The application of Havriliak-Negami model in the description of the relaxation process allowed us to determine relaxation time and consequently activation energy as Ea = 0.48 eV.
The hydrostatic pressure affected both the temperature of phase transition and the relaxation process times. After the sample being pressurized up to 1.7 GPa the phase transition temperature increased by ~ 12 K. Simultaneously the relaxation times got longer which was accompanied by the increase of energy barrier.

*The authors are grateful for the financial support provided by the National Science Centre within the framework of the Opus13 project (Grant No. DEC-2017/25/B/ST3/02321).

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Presenters

  • Anna Szeremeta

    • Institute of Physics, University of Silesia in Katowice

Authors

  • Anna Szeremeta

    • Institute of Physics, University of Silesia in Katowice

  • Andrzej Nowok

    • Institute of Physics, University of Silesia in Katowice

  • Adam Sieradzki

    • Department of Experimental Physics, Wroclaw University of Technology

  • Miroslaw Maczka

    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences

  • Sebastian Pawlus

    • Institute of Physics, University of Silesia in Katowice