CRITICAL BEHAVIOR OF THE SPECIFIC HEAT IN THE VICINITY OF THE TRANSITION TEMPERATURE FOR S-TRIAZINE

2009 ◽  
Vol 23 (09) ◽  
pp. 2253-2259 ◽  
Author(s):  
M. KURT ◽  
H. YURTSEVEN
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Transition Temperature ◽  
Critical Exponent ◽  
Specific Heat ◽  
Power Law ◽  
Order Phase Transition ◽  
Critical Behavior ◽  
First Order ◽  
Second Order Phase Transition

The critical behavior of the specific heat is studied in s-triazine ( C 3 N 3 H 3). Using the experimental data for the CP, the temperature dependence of the specific heat is analyzed according to a power-law formula and the values of the critical exponent for CP are extracted in the vicinity of the transition temperature (TC=198.07 K ). It is indicated that s-triazine undergoes a weakly first order (quasi-continuous) or second order phase transition.

scholarly journals Finite-size effects in disordered λφ4 model

2016 ◽  
Vol 30 (30) ◽  
pp. 1650207 ◽  
Author(s):  
R. Acosta Diaz ◽  
N. F. Svaiter
Keyword(s):  
Phase Transition ◽  
Long Range ◽  
Power Law ◽  
Order Phase Transition ◽  
Size Effects ◽  
Finite Size ◽  
Second Order ◽  
Finite Size Effects ◽  
Power Law Decay ◽  
Second Order Phase Transition

We discuss finite-size effects in one disordered [Formula: see text] model defined in a [Formula: see text]-dimensional Euclidean space. We consider that the scalar field satisfies periodic boundary conditions in one dimension and it is coupled with a quenched random field. In order to obtain the average value of the free energy of the system, we use the replica method. We first discuss finite-size effects in the one-loop approximation in [Formula: see text] and [Formula: see text]. We show that in both cases, there is a critical length where the system develop a second-order phase transition, when the system presents long-range correlations with power-law decay. Next, we improve the above result studying the gap equation for the size-dependent squared mass, using the composite field operator method. We obtain again that the system present a second-order phase transition with long-range correlation with power-law decay.

Target excitation dependence of degree of multifractality and critical exponent in ultrarelativistic nuclear collision

2010 ◽  
Vol 88 (9) ◽  
pp. 651-656 ◽  
Author(s):  
Dipak Ghosh ◽  
Argha Deb ◽  
Ruma Saha ◽  
Rupa Das
Keyword(s):  
Phase Transition ◽  
Critical Exponent ◽  
Order Phase Transition ◽  
Particle Density ◽  
Nuclear Collision ◽  
Particle Density Distribution ◽  
Thermal Phase Transition ◽  
Thermal Phase ◽  
Show Evidence ◽  
Second Order Phase Transition

The target excitation dependence of the degree of multifractality and critical exponent of pions produced for the 16O-AgBr interaction at 60 AGeV has been investigated. To study target excitation dependence, the data for the produced pions were distributed into three sets, depending on the number of grey tracks (ng). The different sets correspond to the different degrees of target excitation. The probability G-moments were used for the analysis in pseudorapidity space. The analysis reveals that the produced particle density distribution possesses multifractal structure for all degrees of target excitation (0 ≤ ng ≤ 3, 4 ≤ ng ≤ 7, and ng ≥ 8). The distribution Levy index and the phase transition critical exponent are calculated. The study indicates the non-thermal phase transition, but it does not show evidence for the second-order phase transition.

Size-dependent ultrahigh electrocaloric effect near pseudo-first-order phase transition temperature in barium titanate nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37476-37484 ◽  
Author(s):  
Hong-Hui Wu ◽  
Jiaming Zhu ◽  
Tong-Yi Zhang
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Order Phase Transition ◽  
Electrocaloric Effect ◽  
First Order ◽  
Size Dependent ◽  
First Order Phase Transition ◽  
Pseudo First Order ◽  
Barium Titanate Nanoparticles ◽  
First Order Phase

The proposed Pseudo-First-Order Phase Transition in a ferroelectric nanoparticle occurs at a temperature lower than its paraelectric/ferroelectric transition Curie temperature and is associated with an ultrahigh electrocaloric effect.

Second-order Phase Transition Behavior in a Polymer above the Glass Transition Temperature

2021 ◽  
Author(s):  
Mitsuru Ishikawa ◽  
Taihei Takahashi ◽  
Yu-ichiro Hayashi ◽  
Maya Akashi ◽  
Takayuki Uwada
Keyword(s):  
Phase Transition ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Order Phase Transition ◽  
Second Order ◽  
Critical Slowing Down ◽  
Phase Transition Behavior ◽  
Slowing Down ◽  
Second Order Phase Transition

<p>Glass transition was primarily considered to be not phase transition; however, it has similarity to the second-order phase transition. Recent single-molecule spectroscopy developments have prompted re-investigating glass transition at the microscopic scale, revealing that glass transition includes phenomena similar to second-order phase transition. They are characterized by microscopic collective polymer motion and discontinuous changes in temperature dependent relaxation times, later of which is similar to critical slowing down, within a temperature window that includes the polymer calorimetric glass transition temperature. Considering that collective motion and critical slowing down are accompaniments to critical phenomena, second-order phase transition behavior was identified in polymer glass transition.</p>

scholarly journals Specific heat and entropy change at the first order phase transition of La(Fe-Mn-Si)13-H compounds

2015 ◽  
Vol 118 (5) ◽  
pp. 053907 ◽  
Author(s):  
Vittorio Basso ◽  
Michaela Küpferling ◽  
Carmen Curcio ◽  
Cecilia Bennati ◽  
Alexander Barzca ◽  
...  
Keyword(s):  
Phase Transition ◽  
Specific Heat ◽  
Order Phase Transition ◽  
Entropy Change ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase

scholarly journals Magnetocaloric effect and critical behavior near the first to second-order phase transition of La0.7Ca0.3−xSnxMnO3 compounds

2020 ◽  
Vol 7 (4) ◽  
pp. 046101
Author(s):  
Dao Son Lam ◽  
Nguyen Thi Dung ◽  
Tran Dang Thanh ◽  
Dinh Chi Linh ◽  
Wen-Zhe Nan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetocaloric Effect ◽  
Order Phase Transition ◽  
Critical Behavior ◽  
Second Order ◽  
Second Order Phase Transition
Sign in / Sign up

Export Citation Format

Share Document