Short-range magnetic order and effective suppression of superconductivity by manganese doping in LaFe1−xMnxAsO1−yFy
| Autor: | Hans-Henning Klauss, G. Pascua, Alexey Marchuk, Frank Tambornino, Rainer Frankovsky, Hubertus Luetkens, Anthony A. Amato, Dirk Johrendt |
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| Rok vydání: | 2013 |
| Předmět: |
Superconductivity
Solid-state chemistry Materials science Condensed matter physics Magnetism Relaxation (NMR) Doping 02 engineering and technology Muon spin spectroscopy 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry 0103 physical sciences Crystallite 010306 general physics 0210 nano-technology Fluoride |
| Zdroj: | Physical Review B. 87 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.87.174515 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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