A. Desimone et G. Dolzmann, Existence of minimizers for a variational problem in two-dimensional nonlinear magnetoelasticity, ARCH R MECH, 144(2), 1998, pp. 107-120
We prove the existence of energy-minimizing configurations for a two-dimens
ional, variational model of magnetoelastic materials capable of large defor
mations. The model is based on an energy functional which is the sum of the
nonlocal self-energy (the energy stored in the magnetic field generated by
the body, and permeating the whole ambient space) and of the local anisotr
opy energy, which is not weakly lower semicontinuous. A further feature of
the model is the presence of a non-convex constraint on one of the unknowns
, the magnetization, which is a unit vector field.