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논문 기본 정보

자료유형
학술저널
저자정보
Yongyut Laosiritaworn (Chiang Mai University) Wimalin Laosiritaworn (Chiang Mai University)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.20 No.1
발행연도
2015.3
수록면
11 - 20 (10page)

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초록· 키워드

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In this work, Monte Carlo simulation was employed to model the stretchable Ising monolayer film to investigate the effect of the spatial distance variation among magnetic atoms on magnetic behavior of the film. The exchange interaction was considered as functions of initial interatomic distance and the stretched distance (or the strain). Following Bethe-Slater picture, the magnetic exchange interaction took the Lennard-Jones potential-like function. Monte Carlo simulations via the Wolff and Metropolis algorithms were used to update the spin systems, where equilibrium and dynamic magnetic profiles were collected. From the results, the strain was found to have strong influences on magnetic behavior, especially the critical behavior. Specifically, the phase transition point was found to either increase or decrease depending on how the exchange interaction shifts (i.e. towards or away from the maximum value). In addition, empirical functions which predict how the critical temperatures scale with initial interatomic distance and the strain were proposed, which provides qualitatively view how to fine tune the magnetic critical point in monolayer film using the substrate modification induced strain.

목차

1. Introduction
2. Stretchable Ising Hamiltonian and Monte Carlo Procedure
3. Results and Discussions
4. Conclusion
References

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