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  1. No Access

    Chapter and Conference Paper

    Critical fluctuations in the 2D XY antiferromagnet BaNi2(PO4)2 : NMR measurements

    Non-linear excitations are known to play a crucial role in low-dimensional magnetism. For the two-dimensional (2D) XY model these non-linear excitations are described in terms of vortices which govern the so-c...

    Ph. Gaveau, J. P. Boucher, L. P. Regnault, Y. Henry in Nonlinear Coherent Structures (1990)

  2. No Access

    Chapter and Conference Paper

    Free vortices in the quasi-two dimensional XY antiferromagnet BaNl2(PO4)2?

    P. Gaveau, J. P. Boucher, A. Bouvet… in Nonlinear Coherent Structures in Physics a… (1991)

  3. No Access

    Chapter

    Non-Linear Excitations in Haldane Spin Chains

    The concept of magnetism in one-dimension (1D) was considered initially as purely theoretical. The idea was to study simple models so as to find reliable solutions, which could apply or be extended to more com...

    J. P. Boucher in Nonlinear Coherent Structures in Physics and Biology (1994)