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1
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Studies of Permittivity in the Triglicinium Sulphate Crystals Doped with Chromium Ions as a Function of Temperature and Electric Field

100%
Dziedzic J.
Acta Physica Polonica A
|
2000
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vol. 98
|
issue 4
373-381
EN
Permittivity in the triglicinium sulphate crystals doped with chromium ions Cr^{3+} as a function of temperature and of intensity of electric field polarising the crystal was investigated. On the base of thermodynamical theory, the relationship among permittivity, temperature and electric field intensity was calculated. Coefficients of the expansion of the thermodynamic potential were determined. Experimental results were compared with those resulting from the thermodynamical theory.
2
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Studies of Elastic Waves Propagation in Triglycine Sulphate Crystals Doped with Chromium Ions

100%
Dziedzic J.
|
EN
Velocities and scattering of transverse elastic wave propagating in the triglycine sulphate crystal doped with the Cr^{3+} ions as a function of temperature and electric field which polarises the crystal were examined. Temperature dependencies of modulus of elasticity S_{55} and modulus of rigidity C_{55} as a function of temperature and an electric field were determined. The results were analysed and discussed.
3
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Ultrathin Glass for the Photovoltaic Applications

64%
Dziedzic J., Inglot M.
Acta Physica Polonica A
|
2017
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vol. 132
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issue 1
176-178
EN
Chemically strengthened ultrathin glass with a thickness of less than 1 mm has many advantages, such as flexibility, smooth surface, good transmittance, excellent gas and water barrier, much higher toughened in relations to thermally tempered glass, higher impact resistance, increased corrosion resistance and much higher abrasion rate. Chemical strengthening process is a process where an ion exchange occurs by diffusion between the glass panes and the brine solution bath. The deeper penetration of the glass surface by ions contained in the brine bath contributes to the hardness of the glass sheets, which reduces the occurrence of surface defects that cause reflections. From the point of view of photovoltaic applications ultrathin glass significantly reduces the weight of the whole photovoltaic panel structure with respect to known solutions. Furthermore, the reduction of the glass thickness increases the transmission of solar energy in the visible range directly through the glass. In addition, chemical tempered glass has a lower reflectance of light from the surface than the thermally tempered glass. What is more, ultrathin glass is perfect substrate for deposition of nanomaterials, i.e. conductive films or quantum dots. In this work we demonstrate that chemically strengthened ultrathin glass is a perfect material for the photovoltaic applications, i.e. as a substrate for deposition of thin layers and for the design of photovoltaic modules of reduced weight.
4
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Study of Spontaneous Polarisation and Pyroelectric Modulus for the Triglycine Sulphate Crystals Doped by Chromium Ions

64%
Dziedzic J., Stolecki B.
Acta Physica Polonica A
|
2000
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vol. 98
|
issue 1-2
55-60
EN
The temperature dependencies of a spontaneous polarisation, P_{s}, and pyroelectric modulus, γ, at different electric field intensities were investigated for the triglycine sulphate crystals doped with the Cr^{3+} chromium ions. On the base of thermodynamic theory the temperature dependencies of P_{s} and γ at different electric field intensities were estimated. The coefficients of the expansion of the thermodynamic potential were determined. The experimental results were compared with those obtained according to the thermodynamic theory.
5
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Ferroelectric Phase Transition in DC Electric Field in [NH_2(CH_3)_2]_3Sb_2Cl_9 Crystals

64%
Dziedzic J., Mróz J.
Acta Physica Polonica A
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2007
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vol. 111
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issue 6
873-876
EN
Dielectric investigations of ferro-paraelectric phase transition under influence of bias pooling DC electric field ranging from 0 to 500 kV/m were performed for [NH_2(CH_3)_2]_3Sb_2Cl_9. The linear shift of T_c towards higher temperatures was observed. The A_0 and B coefficients from the Landau state equation are determined.
6
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Study on Pyroelectric Properties of the TGS-TGSe Crystals with Internal Electric Field

64%
Dziedzic J., Mróz J.
Acta Physica Polonica A
|
2005
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vol. 108
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issue 6
971-978
EN
Measurements of spontaneous polarization and pyroelectric coefficient versus temperature and electric field were performed for the TGS-TGSe crystals at a definite internal electric field. The obtained results are compared with the thermodynamic theory predictions. The temperature and electric field dependencies of pyroelectric coefficient are presented together with its maximal value as a function of the electric field intensity. It was shown that the temperature, at which the pyroelectric coefficient reaches its maximal value, depends on the external electric field.
7
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Pyroelectric and Dilatometric Studies on the Low Temperature Ferroelectric Phase Transition of (CH_3NH_3)_5Bi_2Br_{11}

51%
Dziedzic J., Mróz J., Jakubas R.
Acta Physica Polonica A
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2005
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vol. 108
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issue 3
505-511
EN
The results of the linear thermal expansion studies on (CH_3NH_3)_5Bi_2Br_{11} single crystals in the temperature range 60-340 K are presented. The thermal anomaly in the vicinity of 77 K is assigned to the phase transition classified as close to first order type. The pyroelectric measurements of (CH_3NH_3)_5Bi_2Br_{11} were carried out in the range of 45-320 K along the a- and c-axis. The step-like change in the spontaneous polarization along the a-axis at 77 K indicates a discontinuous character of ferroelectric transition.
8
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Dielectric Properties of the (CH_3NH_3)_5Bi_{2(1- x)}Sb_{2x}Cl_{11} Mixed Crystals

51%
Mróz J., Dziedzic J., Pykacz H.
Acta Physica Polonica A
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2006
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vol. 110
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issue 4
479-483
EN
The (CH_3NH_3)_5Bi_{2(1-x)}Sb_{2x}Cl_{11} crystals were examined from the point of view of their applicability in pyroelectric detectors. It was shown that they can be useful so far as the construction of infrared detectors is concerned due to high values of both their pyroelectric coefficient and figure of merit p/sqrtε which are both comparable with those of triglycine sulphate crystals.
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