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Enformatik Bilim Dalı Yayın Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/6221

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Browsing Enformatik Bilim Dalı Yayın Koleksiyonu by Journal "Ferroelectrics"

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    Article
    Analysis and mathematical computation of some dynamic function for strontium stannate
    (2021) Aşkun, Ali Rıza; 56475
    The frequency and full width at half maximum (FWHM) data of the Ag Raman modes (95.4, 231.4 and 263.2 cm−1) in strontium stannate crystal have been analyzed using the Balkanski model and the fitting parameters were determined. Also, the isobaric Grüneisen parameter of Ag Raman modes studied here was computed below the room temperature. This computation was performed from the unit cell volume and the observed frequency data of this crystal. Finally, values of the activation energy were extracted close to the structural phase transition temperatures of 160 and 265 K using the observed FWHM data of strontium stannate.
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    Article
    Analysis and mathematical computation of some dynamic functions for the guanidine zinc sulfate
    (2021) Aşkun, A.R.; Kiraci, A.; 56475
    A power-law formula with a critical exponent (Formula presented.) was used to analyze the anomalous behavior of the specific heat for guanidine zinc sulfate (GZS) crystal close to the phase transition temperature of TC = 178.4 K. The obtained values of 0.13 and 0.14 for (Formula presented.) below (T < TC) and above (T > TC) the phase transition temperature, respectively, were almost the same value of 0.13 (1/8) that predicted from the 3-D Ising model. Also, the internal energy (Formula presented.) the entropy (Formula presented.) and the free energy (Formula presented.) of this crystal were calculated as a function of temperature close to the phase transition temperature of TC = 178.4 K.