Two-order parameter model for bifurcation and stability analysis of phase transitions through a metastable intermediate state in the presence of external field
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PALADI, Florentin; BARSUK, Alexander A.. Two-order parameter model for bifurcation and stability analysis of phase transitions through a metastable intermediate state in the presence of external field. In: Materials Science and Condensed Matter Physics. Editia a 8-a, 12-16 septembrie 2016, Chişinău. Chişinău: Institutul de Fizică Aplicată, 2016, p. 47. ISBN 978-9975-9787-1-2.
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Materials Science and Condensed Matter Physics
Editia a 8-a, 2016
Conferința "International Conference on Materials Science and Condensed Matter Physics"
8-th Edition, Chişinău, Moldova, 12-16 septembrie 2016

Two-order parameter model for bifurcation and stability analysis of phase transitions through a metastable intermediate state in the presence of external field


Pag. 47-47

Paladi Florentin, Barsuk Alexander A.
 
State University of Moldova
 
Disponibil în IBN: 18 iulie 2019


Rezumat

The system dynamics analysis was achieved by construction of phase portraits for different values of control parameter η compared with the intrinsic transition dynamics as a function of the remaining two control parameters denoted by λ and μ, when η=0. One can be observed in the figure that even if the value of constant control parameter η is very low, this would lead to an increased instability of the system, and reduce the transition rates from the stable liquid state L1 to the stable solid states S+(-). On the other hand, the acceleration of phase transition in the presence of an external periodic field can be confirmed by closeness of unstable states u+ and u- towards the origin which should facilitate fluctuations between solid states S+ and S-, where S+ is assumed to have higher symmetry, i.e. it is structurally stable state and could act as an attractor in the system. Transition rates from liquid to solid state can be also enhanced by adjusting the periodic field frequency.