Hasan Hamit Yurtseven

Department of Physics
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Tricritical behavior of the smectic-hexatic phase transitions in binary mixtures using the landau mean field theory
Yurtseven, Hasan Hamit; Kilit Doğan, Emel (2023-04-01)
The smectic-hexatic phase transitions are studied by the Landau mean field theory in binary mixtures, particularly, THI-14 + MPR-6 liquid crystalline system. By considering the phase lines of SmA-Hex B, SmC-SmF (Hex F) and...
Calculation of the T - X phase diagram and the thermodynamic quantities for the binary mixtures of Tetradecane + Hexadecane using the Landau mean field model
Yurtseven, Hasan Hamit; Tari, Ozlem (2023-01-01)
The Landau model is used to calculate the T–X phase diagram and the temperature dependence of the thermodynamic quantities near the phase transitions in the binary mixtures of tetradecane + hexadecane. The phase line equat...
Investigation of the complex magnetic behavior of Ni46.86Co2.91Mn38.17Sn12.06(at%) magnetic shape memory alloy at low temperatures
Ylldlrlm, Oǧuz; Yuce, Suheyla; Bruno, Nickolaus M; Doǧan, Emel Kilit; Yurtseven, Hasan Hamit; DUMAN, EYÜP; EMRE, ŞİNASİ BARIŞ (2022-08-01)
© 2022 IOP Publishing Ltd.The magnetic properties, martensitic transformation characteristics, the magnetic field-induced transformation characteristics, and super spin-glass behaviour at low temperature of Ni46.86Co2.91Mn...
Calculation of the T – X phase diagram of tetradecane + hexadecane and tetradecane + pentadecane under high pressure by the landau mean field theory
Tari, O.; Yurtseven, Hasan Hamit (2022-08-01)
© 2022 Elsevier B.V.Landau phenomenological model is applied to two binary mixtures (tetradecane + hexadecane and tetradecane + pentadecane) to calculate T−x (temperature - composition) phase diagram under high pressure fo...
Calculation of the phase diagram of n-alkanes (CnH2n+2) by the Landau mean field theory
Yurtseven, Hasan Hamit; Kilit Dogan, E. (2022-05-01)
We study the temperature T and concentration n (number of carbon atoms) dependence on the transitions of the liquid, rotator (RI, RII,RIII,RIVand RV) and crystal phases in n-alkanes (CnH2n+2). The Landau phenomenological m...
Calculation of the T-X phase diagram for the first-order smectic-hexatic transitions in binary mixtures
Kilit Dogan, E.; Yurtseven, Hasan Hamit (2022-04-01)
This work gives the T-X phase diagram calculated from the Landau mean field model for the smectic-hexatic transitions in binary mixtures, particularly, in THI-13+THI-17. It is calculated near the SmC-SmF (Hex F)-Hex B trip...
Magnetic transitions in two novel mixed-valence iron(II)–iron(III) metal formate frameworks: Two sublattice model
Yurtseven, Hasan Hamit; Tari, O. (2022-03-15)
We study the two-sublattice model in the mean field theory by expanding the Gibbs free energy in terms of the magnetizations M1 (Mup) and M2 (Mdown) with the quadratic coupling M12M22 (quadrupolar interactions) for the ord...
Calculation of the spin-lattice relaxation time and the activation energy near the IV–III phase transition in pyridinium fluorosulfonate (C5NH6)FSO3
Kara, N.; Kiraci, A.; Yurtseven, Hasan Hamit (2022-01-01)
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 presen...
Temperature Dependence of the Entropy and the Heat Capacity Calculated from the Raman Frequency Shifts for Solid Benzene, Naphthalene and Anthracene
Yurtseven, Hasan Hamit; Ozdemir, Hilal (2022-1-01)
Temperature dependences of the free energy (F), entropy (S) and the heat capacity are calculated (P=0) for the organic compounds (solid benzene, naphthalene and anthracene) by using the quasiharmonic approximation. Contrib...
Calculation of the magnetization and the heat capacity for [NH2 NH3][M(HCOO)3] (M=Fe, Mn) near the phase transitions
Yurtseven, Hasan Hamit; Doğan, Emel (2022-01-01)
Temperature dependence of the magnetization M(T) is calculated for [NH2 NH3][M(HCOO)3] (M=Fe, Mn), namely, HyFe (perovskite and chiral) below (Formula presented.) =12.5 K and, for HyMn (chiral) below and above (Formula pre...
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