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Elektrik Elektronik Mühendisliği Bölümü

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Browsing Elektrik Elektronik Mühendisliği Bölümü by Author "42475"

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    Citation Count: Yurtseven, H.H.; Kiracı, A. (2017). "BaCeO3'in rhombohedral-tetragonal faz geçişi için Raman frekansından sıcaklığın bir işlevi olarak hesaplanan sönüm sabiti, dielektrik duyarlılık, ters gevşeme zamanı ve aktivasyon enerjisi", Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Vol.19, No.3, pp.77-83.
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    Citation Count: Kiracı, ali. (2022). "Calculation of the Halfwidth and the Activation Energy for the Soft Raman Modes in the Brominated Compounds of Tris-Sarcosine Calcium Chloride", Trends in Sciences, Vol.9, No.16.
    Calculation of the Halfwidth and the Activation Energy for the Soft Raman Modes in the Brominated Compounds of Tris-Sarcosine Calcium Chloride
    (2022) Kiracı, Ali; 42475
    This letter contributes how to calculate the anomalous behavior for the damping constant (halfwidth) of the ferroelectric Tris-Sarcosine Calcium Chloride (TSSC) and its brominated compounds TSSC1−xBrx (x = 0.13, 0.42 and 0.60) from the wavenumber data of the soft modes below the phase transition temperature of TC. The pseudospin-phonon coupled (PS) and the energy fluctuation (EF) models derived from the dynamical Ising model were used. Both PS and EF models have been used to contribute understanding the temperature dependence of the phase transition mechanism of TSSC1−xBrx. In addition, values of the activation energy for TSSC1−xBrx (x = 0, 0.13, 0.42 and 0.60) were extracted from the damping constant as calculated from both models (PS and EF). Our results indicate order-disorder type phase transition for TSSC1−xBrx.
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    Citation Count: Kara, N.; Kiracı, A.; Yurtseven, H. (2022). "Calculation of the spin-lattice relaxation time and the activation energy near the IV–III phase transition in pyridinium fluorosulfonate (C5NH6)FSO3", Ferroelectrics, Vol.589, No.1, pp.45-54.
    Calculation of the spin-lattice relaxation time and the activation energy near the IV–III phase transition in pyridinium fluorosulfonate (C5NH6)FSO3
    (2022) Kara, N.; Kiracı, A.; Yurtseven, H.; 42475
    The spin-lattice relaxation time T1H for protons nuclei is calculated in term of the pseudospin–phonon (PS) coupled and the energy fluctuation (EF) models close to the IV–III solid–solid phase transition of (Formula presented.) in (C5NH6)FSO3. This calculation was performed by associating the observed second moment of the 1H as the order parameter below T C and the disorder parameter above T C. Values of the activation energy for the cation reorientation in this crystal are also deduced by using both models. In addition, the observed dielectric permittivity of this crystal is analyzed within the framework of the Landau theory and values of the spontaneous polarization (P S) are determined as a function of temperature. The normalized values of P S are used in the PS and EF models to extract the activation energy for the reorientation of the dipole moment of this compound arising from cation–anion interaction. Our results show that the PS and EF models can describe the observed behavior of the spin-lattice relaxation time adequately for the IV–III solid–solid transition in (C5NH6)FSO3.