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Article

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Published version

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1999

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10477

Modeling premartensitic effects in Ni2MnGa: A mean-field and Monte Carlo simulation study

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http://dx.doi.org/10.1103/PhysRevB.60.7071

Abstract

ic first-order transition line ending in a critical point. This critical point is responsible for the existence of large premartensitic fluctuations which manifest as broad peaks in the specific heat, not always associated with a true phase transition. The main conclusion is that premartensitic effects result from the interplay between the softness of the anomalous phonon driving the modulation and the magnetoelastic coupling. In particular, the premartensitic transition occurs when such coupling is strong enough to freeze the involved mode phonon. The implication of the results in relation to the available experimental data is discussed.

Subject

Transformacions martensítiques, Xarxes cristal·lines, Mètode de Montecarlo

Subject (English)

Martensitic transformations, Crystal lattices, Monte Carlo method

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

CASTÁN I VIDAL, Maria Teresa, VIVES I SANTA-EULÀLIA, Eduard and LINDGÅRD, Per-Anker. Modeling premartensitic effects in Ni2MnGa: A mean-field and Monte Carlo simulation study. Physical Review B. 1999. Vol. 60, num. 10, pags. 7071-7084. ISSN 0163-1829. [consulted: 19 of August of 2026]. Available at: https://hdl.handle.net/2445/10477

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