Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 23: Magnetic Heuslers, Half-Metals, Semiconductors, and Oxides (organized by MA)
TT 23.12: Vortrag
Montag, 16. März 2015, 18:00–18:15, H 1012
Investigation Of Crystal Structure, Magnetic And Transport Properties Of La2Ni(1-X)Mn(1+X)O6 (X= -0.2; 0; 0.2; 0.4; 0.6; 0.8; 1.0) — •Gizem Aslan Cansever1,3, Franziska Scheibel2, Mehmet Acet2, Ergun Tasarkuyu1, and Michael Farle2 — 1Mugla Sitki Kocman University, Science Faculty,48000 Mugla, Turkey — 2Faculty of Physics, University of Duisburg-Essen, D-47057 Duisburg — 3IFW Dresden, Institute for Solid State Research, D-01069 Dresden, Germany
La2NiMnO6 double perovskit materials show semiconductor and ferromagnetic properties which are important in terms of spintronics applications. In this study, La2Ni(1-x)Mn(1+x)O6 materials were investigated in relation to structural, electrical and magnetic properties with varying Ni and Mn concentrations. The compounds were prepared by using the sol-gel method and then heat treated in a cylindrical furnace at 1000 °C for 24 hours. The energy dispersive x-rays (EDX) analysis shows that the actual compositions of the compounds are very close to the targeted compositions and no impurity phase is present. From the analysis of x-ray diffraction data, it was observed that La2Ni1.2Mn0.8O6 and La2NiMnO6 compounds have monoclinic structure (P21/n), but the rest of the compounds exhibit the orthorhombic (Pbnm) structure. Electrical resistivity measurements show that all compunds have semiconductor behaviour. The magnetization measurements show that La2Mn2O6 incorporates both antiferromagnetic and ferromagnetic interactions. All other investigated compounds show ferromagnetic behaviour.