Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 27: Half-metals and Oxides (jointly with TT)
MA 27.3: Vortrag
Mittwoch, 28. März 2012, 10:00–10:15, EB 202
Strained thin films of LaSrMnO4 grown by Pulsed Laser Deposition — •Mehran Vafaee Khanjani, Philipp Komissinskiy, Aldin Radetinac, Thorsten Bitsch, and Lambert Alff — Institute for Materials Science, Technische Universität Darmstadt, 64287 Darmstadt, Germany
It is well known that charge and orbital ordering (COO) phenomena occur in a variety of manganese oxide compounds. In the single-layered Ruddlesden-Popper manganite La1−xSr1+xMnO4, the COO has been observed for x = 0.5 which is strongly related to the lattice constants (a = 3.86, c = 12.42 Å) and Mn-O bond length [1-3]. Strain in thin films affects the structure parameters and consequently the COO. For the first time, we report on the thin film deposition of LaSrMnO4 using pulsed laser deposition. X-ray diffraction reveals the growth of either fully strained or totally relaxed thin films on (110) NdGaO3 and (001) LaSrAlO4 substrates. Such strained thin films with in-plane lattice constants close to the x = 0.5 compound (a = 3.86, c = 12.87) will be the base to study the strain dependence of orbital ordering e.g. by X-ray absorption techniques. The authors would like to thank DPG GK 1035.
[1] D. Senff et al, Phys. Rev. B 71, 024425 (2005). [2] R. Mahesh et al, J. Solid State Chem. 122, 448 (1996) [3] C. S. Hong et al, Chem. Mater. 13, 945 (2001).