Numerical Study on Resistance Change Characteristics of Phase Change Materials

Phase change materials are a type of emerging materials whose states will change under certain conditions, which then lead to changes in resistance. To study the characteristics of the phase change materials, a numerical simulation model of the resistive change unit based on the finite element metho...

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Bibliographic Details
Published in:Advances in materials science and engineering 2021, Vol.2021 (1)
Main Authors: Su, Yifang, Zhang, Yihang, Lin, Kaifeng, Zhao, Guanjun, Yu, Qinzheng, Hu, Zuoqi, Tao, Xiongfei
Format: Article
Language:English
Subjects:
Amorphous materials
Computer simulation
Conduction heating
Conductive heat transfer
Crystallization
Electrodes
Finite element analysis
Finite element method
Heat
Mathematical models
Nucleation
Partial differential equations
Phase change materials
Phase transitions
Simulation
Thermal energy
Thermodynamic properties
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Summary:Phase change materials are a type of emerging materials whose states will change under certain conditions, which then lead to changes in resistance. To study the characteristics of the phase change materials, a numerical simulation model of the resistive change unit based on the finite element method and the classic nucleation/growth theory is established, while the partial differential equations of electricity and heat conduction and the discrete formula of the finite element are also derived. According to the phase transition process of phase change materials, a crystalline-amorphous simulation model is also proposed in this paper to simulate the electrical and thermal properties and phase transition process of the resistive change unit. Simulations of the resistance change unit under single pulses with different amplitudes and widths as well as the simulations under continuous pulses are conducted in this paper. These results verify the characteristics of resistance change and can provide references for selecting the parameters of the resistance change units.
ISSN:1687-8434
1687-8442
DOI:10.1155/2021/7934173