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1 results

  • 4 - Coupling of ferroic degrees of freedom: multiferroics

  • from Part II - Applications
  • Antoni Planes, University of Barcelona, Avadh Saxena, Los Alamos National Laboratory
  • Book:
    Phase Transitions
    Published online:
    01 May 2025
    Print publication:
    15 May 2025, pp 151-174

  • Summary

    The general concept of multiferroic materials as those with strong interplay between two or more ferroic properties is first introduced. Then, particular cases of materials with coupling magnetic and polar (magnetoelectric coupling), polar and structural (electrostructural coupling), and magnetic and structural (magnetostructural coupling) degrees of freedom are discussed in more detail. The physical origin of the interplay is analysed and symmetry-based considerations are used to determine the dominant coupling terms adequate to construct extended Ginzburg–Landau models that permit the determination of cross-response to multiple fields. The last part of the chapter is devoted to study morphotropic systems and morphotropic phase boundaries that separate crystallographic phases with different polar (magnetic) properties as examples of materials with electro(magneto)-structural interplay and that are expected to show giant cross-response to electric (magnetic) and mechanical fields.