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MA: Magnetismus
MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)
MA 20.117: Poster
Tuesday, March 28, 2006, 15:15–19:15, P1
Model study of EuB6 and half-metals in general — •Michael Kreissl and Wolfgang Nolting — Institut fü Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
By means of a recently developed many-body-theory for the Kondo lattice model, the electronic and magnetic properties of half-metals were studied.
We present temperature dependant quasiparticle density of states, band structure and magnetization, as well as the Curie temperature for various coupling strengths. With a specific parameter set, motivated through experimental data, we were able to reproduce the electronic properties of EuB6 which undergoes a half-metal to semiconductor transition concomitant with the magnetic phase transition.