Dresden 2009 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 21: Magnetic Shape Memory Alloys I
MA 21.4: Vortrag
Mittwoch, 25. März 2009, 11:00–11:15, HSZ 103
Epitaxial growth of Ni2MnGa films on perovskite manganite oxides — •Yuansu Luo, Jan Petersen, and Konrad Samwer — I. Physikalisches Institut, Universität Göttingen, Friedrich-Hund Platz 1, 37077 Göttingen
Magnetic sharp memory (MSM) films Ni2MnGa were sputtered onto perovskite manganite oxide layers, such as La0.7Ca0.3MnO3 (LCMO) to show a potential affect coupled with Jahn-Teller distortion and MSM effect. The manganite layer (80 nm) was deposited at deposition temperature Ts= 700∘C on MgO(100) substrate and subsequently the MSM layer (150nm) at varied Ts in the range 500-600∘C. Structural investigation was carried out by x-ray diffraction and scanning electron microscopy. The initial result indicates a well epitaxial growth of Ni2MnGa on the LCMO layer, showing a martensitic phase at room temperature with twin structure strips along two vertical orientations. The microstructure of the samples strongly depends on Ts used. Compared to polycrystalline samples prepared on SiO2, the epitaxial growth used here is advantageous to form the martensitic phase. (Supported by BMBF-project 13N10061 MSM-Sens)