Regensburg 2004 – wissenschaftliches Programm

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MA: Magnetismus

MA 13: Poster:Schichten(1-23),Spinabh.Trsp(24-41),Exch.Bias(42-56),Spindyn.(57-67),Mikromag.(68-76),Partikel(77-90),Spinelektr.(91-97),Elektr.Theo.(98-99),Mikromag+PhasÜ+Aniso.(100-105),Magn.Mat.(106-118),Messmethod.(119-121),Obflm.+Abbverf.(122-123)

MA 13.117: Poster

Dienstag, 9. März 2004, 15:00–19:00, Bereich A

The effect of Zn and Cr doping on structural and magnetic properties of Sr₂FeReO₆ — •A. Jung, I. Bonn, J. Ensling, V. Ksenofontov, C. Felser, and W. Tremel — Johannes Gutenberg - Universität, Institut für Anorganische Chemie und Analytische Chemie, 55099 Mainz

Magnetic properties of doped double perovskites with formula Sr₂Fe_1−xM_xReO₆ (M = Zn, Cr) strongly correlate with their structure. The relation of ionic radii of iron and substituting transitional metals is a decisive factor which determines the cubic or tetragonal modifications of doped Sr₂FeReO₆. We report on the magnetic and structural properties of solid solutions Sr₂Fe_1−xM_xReO₆ in a wide range of concentrations 0 ≤ x ≤ 1. ⁵⁷Fe Mössbauer spectroscopic studies revealed that the relation of amount of Fe²⁺ and Fe³⁺ ions is another important factor influencing the structure of these compounds. Magnetic properties of doped double perovskites are interpreted by means of FLAPW band structure calculations using the WIEN97 software package.