Lindgård, Per-Anker

The indirect exchange interaction (RKKY) is calculated for the heavy rare earth metals. The conduction electrons are treated by the argumented-plane-wave (APW) method. Numerical results for the susceptibility xq for APW- and free electrons are given. The numerical accuracy is tested for the free electronmodel using both a root-sampling method and a linearized integral method. The first method requires 450,000 and the latter 9,000 points in the entire Brillouin zone for a good agreement with the Lindhard function. Xq and the wave vector dependent exchange integral J is calculated for Gd, Tb, Dy, and Er in the ordered phase. Jq is calculated for Gd with the inclusion of the matrix element, calculated on the basis of APW functions

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Exchange interaction in the heavy rare earth metals calculated from energy bands

http://orbit.dtu.dk/ws/files/55831221/ris_m_1701.pdf

Exchange interaction in the heavy rare earth metals calculated from energy bands

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Online Research Database In Technology