161 citations · 162 across the 2 of their papers we have counts for
9 papers
Many-body Green's function theory of Heisenberg films
P. Fröbrich, P. J. Kuntz
The treatment of Heisenberg films with many-body Green's function theory (GFT) is reviewed. The basic equations of GFT are derived in sufficient detail so that the rest of the pape…
The magnetic reorientation transition in thin ferromagnetic films treated by many-body Green's function theory
P. Fröbrich, P. J. Kuntz
This contribution describes the reorientation of the magnetization of thin ferromagnetic Heisenberg films as function of the temperature and/or an external field. Working in a rota…
Coupled ferro-antiferromagnetic Heisenberg bilayers investigated by many-body Green's function theory
P. Fröbrich, P. J. Kuntz, P. J. Jensen
A theory of coupled ferro- and antiferromagnetic Heisenberg layers is developed within the framework of many-body Green's function theory (GFT) that allows non-collinear magnetic a…
Many-body Green's function theory of ferromagnetic Heisenberg systems with single-ion anisotropies in more than one direction
Huai-Yu Wang, Zhen-Hong Dai, P. Fröbrich +2
The behaviour of ferromagnetic systems with single-ion anisotropies in more than one direction is investigated with many-body Green's function theory generalizing earlier work with…
The treatment of zero eigenvalues of the matrix governing the equations of motion in many-body Green's function theory
P. Fröbrich, P. J. Kuntz
The spectral theorem of many-body Green's function theory relates thermodynamic correlations to Green's functions. More often than not, the matrix governing the equations of motion…
Single-ion versus exchange anisotropy in calculating anisotropic susceptibilities of thin ferromagnetic Heisenberg films within many-body Green's function theory
P. Fröbrich, P. J. Kuntz
We compare transverse and parallel static susceptibilities of in-plane uniaxial anisotropic ferromagnetic Heisenberg films calculated in the framework of many-body Green's function…