title: Structural transition and unusually strong antiferromagnetic superexchange coupling in perovskite KAgF3.
abstract: High-purity samples of potassium trifluoroargentate(II), KAgF3, have been obtained via a novel synthetic pathway. This compound is found to exhibit an order-disorder phase transition around 230 K. Susceptibility measurements indicate that KAgF3 exhibits strong antiferromagnetic (AFM) coupling reminiscent of that found in copper(II) oxides.
authors.affiliation: Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland. dkurzydlowski@chem.uw.edu.pl
authors.forename: Dominik
authors.initials: D
authors.lastname: Kurzydłowski
authors.forename: Zoran
authors.initials: Z
authors.lastname: Mazej
authors.forename: Zvonko
authors.initials: Z
authors.lastname: Jagličić
authors.forename: Yaroslav
authors.initials: Y
authors.lastname: Filinchuk
authors.forename: Wojciech
authors.initials: W
authors.lastname: Grochala
mesh_terms: D005459:Fluorides / Q000737:chemistry*; D060526:Magnetic Fields; D008958:Models, Molecular; D015394:Molecular Structure; D011188:Potassium / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013696:Temperature
chemical_list: D012834:Silver; D005459:Fluorides; D011188:Potassium