Magnetic groundstate and Fermi surface of bcc Eu

Details Magnetic groundstate and Fermi surface of bcc Eu Magnetic groundstate and Fermi surface of bcc Eu

2004-04-15

arxiv.org/abs/cond-mat/0404369v1

Phys. Rev. B 70, 174415 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages 8 figures

Scientific paper

10.1103/PhysRevB.70.174415

Using spin-spiral technique within the full potential linearized augmented-plane-waves (LAPW) electronic structure method we investigate the magnon spectrum and N\'eel temperature of bcc Eu. Ground state corresponding to an incommensurate spin-spiral is obtained in agreement with experiment and previous calculations. We demonstrate that the magnetic coupling is primarily through the intra-atomic $f-s$ and $f-d$ exchange and Ruderman-Kittel-Kasuya-Yosida mechanism. We show that the existence of this spin-spiral is closely connected to a nesting feature of the Fermi surface which was not noticed before.

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