Limits...
Study of pressure influence on thermal transition in spin-crossover nanomaterials.

Gudyma IV, Maksymov AIu, Ivashko VV - Nanoscale Res Lett (2014)

Bottom Line: The thermal transition accompanied by the variation of the molecular volume in nanoparticles of spin-crossover materials has been studied on the basis of microscopic Ising-like model solved using Monte Carlo methods.For considered model, we examined the spin-crossover phenomenon with applied hydrostatic pressure and thus was shown the possibility to shift transition temperature toward its room value.The obtained results of numerical simulations are in agreement with the experimental ones.

View Article: PubMed Central - PubMed

Affiliation: Department of General Physics, Chernivtsi National University, Kotsjubynskyi Str. 2, 58012, Chernivtsi, Ukraine, yugudyma@gmail.com.

ABSTRACT
The thermal transition accompanied by the variation of the molecular volume in nanoparticles of spin-crossover materials has been studied on the basis of microscopic Ising-like model solved using Monte Carlo methods. For considered model, we examined the spin-crossover phenomenon with applied hydrostatic pressure and thus was shown the possibility to shift transition temperature toward its room value. The obtained results of numerical simulations are in agreement with the experimental ones.

No MeSH data available.


The behavior of transition curves for simultaneous variation of temperature andpΔVfor interaction constantJ=145K.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4494018&req=5

Fig2: The behavior of transition curves for simultaneous variation of temperature andpΔVfor interaction constantJ=145K.

Mentions: The detailed characteristic of behavior of thermal transition curves on changing of applied pressure and temperature has been carried out, and the resulting three-dimensional plot has been built. It is presented in Figure 2. From this plot, we can analyze the changes of transition temperature with gradual increasing of the pressure. For the system with initial hysteresis, obtained for the interaction constant J=145 K, with pressure increasing, it may be distinguished from two different regions of system behavior that are divided in the figure by yellow plane. In the first region which is between pΔV=0 K and pΔV=500 K, the system shows hysteresis with decreasing width, and for the value of pΔV=500 K, it collapses. From this point begins the second region where system undergoes the second-order phase transition with shifting of transition curves toward higher temperatures if pressure is still increasing.Figure 2


Study of pressure influence on thermal transition in spin-crossover nanomaterials.

Gudyma IV, Maksymov AIu, Ivashko VV - Nanoscale Res Lett (2014)

The behavior of transition curves for simultaneous variation of temperature andpΔVfor interaction constantJ=145K.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494018&req=5

Fig2: The behavior of transition curves for simultaneous variation of temperature andpΔVfor interaction constantJ=145K.
Mentions: The detailed characteristic of behavior of thermal transition curves on changing of applied pressure and temperature has been carried out, and the resulting three-dimensional plot has been built. It is presented in Figure 2. From this plot, we can analyze the changes of transition temperature with gradual increasing of the pressure. For the system with initial hysteresis, obtained for the interaction constant J=145 K, with pressure increasing, it may be distinguished from two different regions of system behavior that are divided in the figure by yellow plane. In the first region which is between pΔV=0 K and pΔV=500 K, the system shows hysteresis with decreasing width, and for the value of pΔV=500 K, it collapses. From this point begins the second region where system undergoes the second-order phase transition with shifting of transition curves toward higher temperatures if pressure is still increasing.Figure 2

Bottom Line: The thermal transition accompanied by the variation of the molecular volume in nanoparticles of spin-crossover materials has been studied on the basis of microscopic Ising-like model solved using Monte Carlo methods.For considered model, we examined the spin-crossover phenomenon with applied hydrostatic pressure and thus was shown the possibility to shift transition temperature toward its room value.The obtained results of numerical simulations are in agreement with the experimental ones.

View Article: PubMed Central - PubMed

Affiliation: Department of General Physics, Chernivtsi National University, Kotsjubynskyi Str. 2, 58012, Chernivtsi, Ukraine, yugudyma@gmail.com.

ABSTRACT
The thermal transition accompanied by the variation of the molecular volume in nanoparticles of spin-crossover materials has been studied on the basis of microscopic Ising-like model solved using Monte Carlo methods. For considered model, we examined the spin-crossover phenomenon with applied hydrostatic pressure and thus was shown the possibility to shift transition temperature toward its room value. The obtained results of numerical simulations are in agreement with the experimental ones.

No MeSH data available.