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Precursor nanoscale modulations in ferromagnets: Modeling and thermodynamic characterization
Porta Tena, Marcel; Castán i Vidal, Maria Teresa; Planes Vila, Antoni; Saxena, A. (Avadh)
Universitat de Barcelona
Using a Ginzburg-Landau model for the magnetic degrees of freedom with coupling to disorder, we demonstrate through simulations the existence of stripelike magnetic precursors recently observed in Co-Ni-Al alloys above the Curie temperature. We characterize these magnetic modulations by means of the temperature dependence of local magnetization distribution, magnetized volume fraction, and magnetic susceptibility. We also obtain a temperature-disorder strength phase diagram in which a magnetic tweed phase exists in a small region between the paramagnetic and dipolar phases.
Materials ferromagnètics
Mètodes de simulació
Transformacions martensítiques
Ferromagnetic materials
Simulation methods
Martensitic transformations
(c) The American Physical Society, 2005
Article
The American Physical Society
         

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