51 citations · 108 across the 5 of their papers we have counts for
3 papers · 1 filter
The variational symmetries and conservation laws in classical theory of Heisenberg (anti)ferromagnet
R. F. Egorov, I. G. Bostrem, A. S. Ovchinnikov
The nonlinear partial differential equations describing the spin dynamics of Heisenberg ferro and antiferromagnet are studied by Lie transformation group method. The generators of…
A long-wave action of spin Hamiltonians and the inverse problem of the calculus of variations
I. G. Bostrem, A. S. Ovchinnikov, R. F. Egorov
We suggest a method of derivation of the long-wave action of the model spin Hamiltonians using the non-linear partial differential equations of motions of the individual spins. Acc…
A new class of nodal stationary states in 2D Heisenberg ferromagnet
I. G. Bostrem, A. S. Ovchinnikov
A new class of nodal topological excitations in a two-dimensional Heisenberg model is studied. The solutions correspond to a nodal singular point of the gradient field of the azimu…