Temperature and the field dependence of the magnetization close to order-disorder phase transitions in DMMn and the chromium-doped DMMn

Date

2018-11-01

Author

Yurtseven, Hasan Hamit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

138
views

0
downloads

We study the temperature and field dependence of the magnetization M(T,H) for the order-disorder transition in DMMn and the chromium-doped DMMn close to T-c. By analyzing the experimental data for M(T,H) from the literature according to the power-law formula, values of the critical exponent (beta) and the critical isotherm (delta) are deduced and also, the temperature dependence of magnetization M(T) is calculated from the molecular field theory for those compounds.

Subject Keywords

Physical and Theoretical Chemistry, Inorganic Chemistry, Materials Chemistry

URI

https://hdl.handle.net/11511/40943

Journal

POLYHEDRON

DOI

https://doi.org/10.1016/j.poly.2018.07.046

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Temperature dependence of the polarization and the dielectric constant near the paraelectric-ferroelectric transitions in BaTiO3 Yurtseven, Hasan Hamit (Springer Science and Business Media LLC, 2013-09-01) Temperature dependences of the spontaneous polarization and the dielectric constant are calculated near the paraelectric-ferroelectric (cubic-tetragonal) transition in BaTiO3 using our mean field model. By expanding the free energy in terms of the spontaneous polarization (order parameter), expressions for the temperature dependence of the spontaneous polarization and the dielectric constant are derived. By considering the temperature dependence of the Raman frequencies for the lattice mode (310 cm(-1)) whi...
Pressure dependence of the Raman frequencies for the modes I, II and III at constant temperatures in phase II of benzene Ozdemir, H.; Yurtseven, Hasan Hamit (Elsevier BV, 2015-01-25) We study here the pressure dependence of the Raman frequencies for different modes in phase II of benzene at constant temperatures. By using the experimental data for the volume, we calculate the Raman frequency as a function of pressure at constant temperatures through the isothermal mode Gruneisen parameter for the modes studied. Our calculations show that the Raman frequencies predicted, agree well with the observed frequencies for the modes in phase II of benzene. The isothermal mode Gruneisen parameter...
Temperature and pressure dependence of molar volume in solid phases of ammonia near the melting point Yurtseven, Hasan Hamit (Elsevier BV, 2008-08-20) Temperature and pressure dependencies of the molar volume are studied here along the transition curve between solid I and solid II phases near the melting point in ammonia. The molar volumes are calculated in the temperature range of 217 to 224 K and in the pressure range of 3 to 8 kbar with respect to the triple point (T-t=217.34 K. P-t=3.070 kbar) where the melting curves of solid I and solid II coincide with the transition curve in ammonia.
Development of the ReaxFF Reactive Force Field for Inherent Point Defects in the Si/Silica System Nayir, Nadire; van Duin, Adri C. T.; Erkoç, Şakir (American Chemical Society (ACS), 2019-05-16) We redeveloped the ReaxFF force field parameters for Si/O/H interactions that enable molecular dynamics (MD) simulations of Si/SiO2 interfaces and O diffusion in bulk Si at high temperatures, in particular with respect to point defect stability and migration. Our calculations show that the new force field framework (ReaxFF(present)), which was guided by the extensive quantum mechanical-based training set, describes correctly the underlying mechanism of the O-migration in Si network, namely, the diffusion of...
Temperature dependence of the Raman frequency of an internal mode for SiO2-moganite close to the α-β Transition Lider, Mustafa Cem; Yurtseven, Hasan Hamit (2012-12-01) The temperature dependence of the 501 cm frequency of the vibrational mode is analyzed for SiO moganite. The experimental data for the heating and cooling cycles of moganite from the literature is used for our analysis. The coexistence of moganite is obtained over a finite temperature interval, and the moganite transition at around 570 K is studied, as observed experimentally.

Citation Formats

H. H. Yurtseven, “Temperature and the field dependence of the magnetization close to order-disorder phase transitions in DMMn and the chromium-doped DMMn,” POLYHEDRON, pp. 132–137, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40943.