Magnetic ground state and Fermi surface of bcc Eu
J. Kuneš
Department of Physics, University of California, One Shields Avenue, Davis, California 95616, USA and Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10,162 53 Praha 6, Czech Republic
R. Laskowski
Institut for Fysik og Astronomi Aarhus Universitet, Ny Munkegade, 8000 Aarhus C, Denmark
(Received 8 April 2004; revised manuscript received 25 August 2004; published 12 November 2004)
Abstract
Using spin-spiral technique within the full potential linearized augmented-plane-waves (LAPW) electronic structure method, we investigate the magnon spectrum and Néel 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.
https://www.fzu.cz/~kunes/papers/e174415.pdf
Department of Physics, University of California, One Shields Avenue, Davis, California 95616, USA and Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10,162 53 Praha 6, Czech Republic
R. Laskowski
Institut for Fysik og Astronomi Aarhus Universitet, Ny Munkegade, 8000 Aarhus C, Denmark
(Received 8 April 2004; revised manuscript received 25 August 2004; published 12 November 2004)
Abstract
Using spin-spiral technique within the full potential linearized augmented-plane-waves (LAPW) electronic structure method, we investigate the magnon spectrum and Néel 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.
https://www.fzu.cz/~kunes/papers/e174415.pdf
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