%0 Journal Article
%T Short range magnetic order and effective suppression of superconductivity by manganese-doping in LaFe1-xMnxAsO1-yFy
%A Rainer Frankovsky
%A Hubertus Luetkens
%A Frank Tambornino
%A Alexey Marchuk
%A Gwendolyne Pascua
%A Alex Amato
%A Hans-Henning Klauss
%A Dirk Johrendt
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevB.87.174515
%X We present a study of the structural and physical properties of directly hole doped LaFe1-xMnxAsO (x = 0.0-0.2) and the influence of charge compensation / electron-doping by additional F doping in LaFe0.9Mn0.1AsO1-yFy (y = 0.1-0.5). High quality polycrystalline samples were prepared using a solid state metathesis reaction. The unit cell increases upon Mn doping, but decreases again when additional F is inserted. The semiconducting character of LaFe1-xMnxAsO decreases with additional F doping. Muon spin relaxation (muSR) measurements reveal short range magnetic order in LaFe1-xMnxAsO and a suppression of magnetism by additional electron-doping with fluoride in LaFe0.9Mn0.1AsO1-yFy. Superconductivity remains absent even though the electronic preconditions are fulfilled in electron-doped LaFe0.9Mn0.1AsO1-yFy at x > 0.1, which is suggestive of effective pair breaking by Mn in this system.
%U http://arxiv.org/abs/1303.6833v1