Analysis and calculation of the magnetization, magnetic susceptibility and the specific heat close to phase transitions in heterometallics

Date

2019-10-01

Author

Dugan, E. Kilit
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

234
views

0
downloads

The temperature dependence of the magnetization for DMFeNi and DMFeCu is calculated by the molecular field theory and it is also analyzed as functions of temperature and the magnetic field by the power-law formulae close to the phase transitions in these compounds by using the observed data from the literature. From the analysis, values of the critical exponents beta (temperature-induced order parameter at H = 100 Oe) and delta (field-induced order parameter at T = 2 K) are deduced. Also, using the observed M-H data, magnetic susceptibility is calculated as a function of the magnetic field for DMFeNi and DMFeCu. Regarding the thermal properties of MOFs, the specific heat of DMFeFe, as an example, is calculated by an Ising model superimposed on an Einstein and/or Debye model using the observed C-P data from the literature.

Subject Keywords

General Physics and Astronomy, General Materials Science

URI

https://hdl.handle.net/11511/48064

Journal

CURRENT APPLIED PHYSICS

DOI

https://doi.org/10.1016/j.cap.2019.07.002

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Analysis of the orientational order parameter and the magnetic field as functions of temperature for p-anisaldazine Yurtseven, Hasan Hamit (Korean Physical Society, 2016-06-01) We analyze in this study the orientational order parameter and the magnetic field as functions of temperature close to the nematic-isotropic liquid (NI) transition in anisaldazine. The experimental data from the literature are analyzed by using a power-law formula for both the orientational order parameter and the magnetic field, and the critical exponents are deduced. In particular, the mean field value of beta = 0.5 for the critical exponent of the orientational order parameter is used, and the power-law ...
Calculation of the infrared frequency and the damping constant (full width at half maximum) for metal organic frameworks Kurt, M.; Yurtseven, Hasan Hamit; Kurt, Aygül; Aksoy, S. (IOP Publishing, 2019-06-01) The rho(NH2) infrared (IR) frequencies and the corresponding full width at half maximum (FWHM) values for (CH3)(2)(NH2FeMII)-M-III(HCOO)(6) (DMFeM, M = Ni, Zn, Cu, Fe, and Mg) are analyzed at various temperatures by using the experimental data from the literature. For the analysis of the IR frequencies of the rho(NH2) mode which is associated with the structural phase transitions in those metal structures, the temperature dependence of the mode frequency is assumed as an order parameter and the IR frequenci...
Calculation of the Raman frequencies of lattice modes in the disordered phase II of NH4Br at high pressures Yurtseven, Hasan Hamit (Physics Essays Publication, 2010-01-01) The Raman frequencies are calculated here at various temperatures for the nu(7) (56 cm(-1)) and nu(5) (134 cm(-1)) lattice modes in the disordered phase II of NH4Br. The lattice parameter data obtained at zero pressure are used to calculate the Raman frequencies of those modes studied for constant pressures of 0.1, 108, and 637.5 MPa in phase II of the NH4Br crystal. Through the mode Gruumlneisen parameter which is kept constant in the disordered phase II, the Raman frequencies calculated decrease linearly ...
Calculation of the tilt angle and susceptibility as functions of temperature and the electric field close to the Sm A - Sm C* transition in C7 AKSOY, SERKAN; Yurtseven, Hasan Hamit; KURT, MUSTAFA (Canadian Science Publishing, 2018-07-01) Smectic A - Smectic C* transition in the ferroelectric liquid crystal (C7) is studied as a function of the electric field and the temperature. By expanding the free energy in terms of the tilt angle theta (Smectic C* phase) and the polarization P with a linear coupling between theta and P (P theta) in mean field theory, the tilt angle is calculated as a function of the electric field (theta versus E) at constant temperatures with respect to the transition temperature for C7 using the observed data from the ...
Optimization of Joule-Thomson cryocooler heat exchanger using one-dimensional numerical modeling Baki, Murat; Okutucu-Özyurt, Tuba; Sert, Cüneyt (Elsevier BV, 2019-12-01) Steady state operation of the heat exchanger of a Joule-Thomson cryocooler is studied numerically through a one-dimensional model. Argon is used as the working fluid. The developed model is first verified using a cooler configuration that is studied extensively in the literature. Then the model is improved in several ways. A major mistake seen in many of the previous studies is related to the mismatch of the friction coefficient correlation and the conservation of momentum equation of the tube side flow. Wi...

Citation Formats

E. K. Dugan and H. H. Yurtseven, “Analysis and calculation of the magnetization, magnetic susceptibility and the specific heat close to phase transitions in heterometallics,” CURRENT APPLIED PHYSICS, pp. 1096–1102, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48064.