Title:
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Premartensitic transition driven by magnetoelastic interaction in bcc ferromagnetic Ni2MnGa
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Author:
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Planes Vila, Antoni; Obradó Llauradó, Eduard; Gonzàlez Comas, Alfons; Mañosa, Lluís
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Other authors:
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Universitat de Barcelona |
Abstract:
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We show that the magnetoelastic coupling between the magnetization and the amplitude of a short wavelength phonon enables the existence of a first order premartensitic transition from a bcc to a micromodulated phase in Ni2MnGa. Such a magnetoelastic coupling has been experimentally evidenced by ac susceptibility and ultrasonic measurements under an applied magnetic field. A latent heat around 9 J/mol has been measured using a highly sensitive calorimeter. This value is in very good agreement with the value predicted by a proposed model. |
Subject(s):
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-Equacions d'estat -Ciència dels materials -Regla de les fases i equilibri -Equations of state -Materials science -Phase rule and equilibrium |
Rights:
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(c) American Physical Society, 1997
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Document type:
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Article Article - Published version |
Published by:
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American Physical Society
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