2007/12/06 by Michael Kreissl, M Kreissl, Wolfgang Nolting +1
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Electron #Ferromagnetism #Heusler alloys: electronic and magnetic properties #Magnetic moment #Magnetic semiconductor #Magnetization #Phase (matter) #Phase transition #Rare-earth and actinide compounds #Semimetal #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/20/03/035222
published as J. Phys.: Condens. Matter 20 035222 (2008) · 10 pages, 5 figures, submitted to Journal of Physics: Condensed Matter
arxiv created 2007/12/06 · openalex publication_date 2007/12/19 · arxiv updated 2011/11/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We introduce a two-band Kondo-lattice model to describe ferromagnetic half-metals with local magnetic moments. In a model study, the electronic and magnetic properties are presented by temperature dependent magnetization curves, band-structures, spin polarizations and plasma frequencies. These are obtained from numerically evaluated equations, based on the single-electron Green functions. We show that the mutual influence between the itinerant electrons and the local magnetic moments is responsible for several phase transitions of the half-metals, namely first and second order magnetic phase transitions, as well as half-metal to semiconductor and half-metal to semimetal transitions.