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2001

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10493

Magnetic phase separation in ordered alloys

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Abstract

We present a lattice model to study the equilibrium phase diagram of ordered alloys with one magnetic component that exhibits a low temperature phase separation between paramagnetic and ferromagnetic phases. The model is constructed from the experimental facts observed in Cu3-xAlMnx and it includes coupling between configurational and magnetic degrees of freedom that are appropriate for reproducing the low temperature miscibility gap. The essential ingredient for the occurrence of such a coexistence region is the development of ferromagnetic order induced by the long-range atomic order of the magnetic component. A comparative study of both mean-field and Monte Carlo solutions is presented. Moreover, the model may enable the study of the structure of ferromagnetic domains embedded in the nonmagnetic matrix. This is relevant in relation to phenomena such as magnetoresistance and paramagnetism

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http://dx.doi.org/10.1103/PhysRevB.63.224418

Subject

Mecànica estadística, Transformacions de fase (Física estadística), Mètode de Montecarlo, Aliatges

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Statistical mechanics, Phase transformations (Statistical physics), Monte Carlo method, Alloys

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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MARCOS, Jordi, VIVES I SANTA-EULÀLIA, Eduard and CASTÁN I VIDAL, Maria Teresa. Magnetic phase separation in ordered alloys. Physical Review B. 2001. Vol. 63, num. 22, pags. 224418-1-224418-10. ISSN 0163-1829. [consulted: 9 of October of 2026]. Available at: https://hdl.handle.net/2445/10493

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