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Ding H.F.,Nanjing National Laboratory of Solid State Microstructures
Proceedings - 2010 8th International Vacuum Electron Sources Conference and Nanocarbon, IVESC 2010 and NANOcarbon 2010 | Year: 2010

Magnetic nanostructures are of current interest due to the rich emerging physics and potential applications. With the advance of modern growth and imaging techniques, it is now possible to fabricate structures down to the atomic level. Atomic manipulation through scanning tunneling microscopy (STM) provides an interesting way for creating structures in a designed fashion and investigating their physics [1,2]. Alternatively, self-assembly growth is appealing especially for potential applications as the structures can be fabricated more economically and in relatively large-scale homogeneity. Recently, substrate mediated long-range interactions (LRI) between adatoms were explored to create self-assembled atomic structures. Though many experimental attempts have been carried out, the well-ordered hexagonal superstructures, however, only exist on a few systems like Ce/Ag(111) and Ce/Cu(111) [3,4]. The detailed understanding of the formation mechanism for the superstructures is still missing. © 2010 IEEE. Source


Tao Z.K.,Nanjing National Laboratory of Solid State Microstructures | Cui X.G.,Nanjing National Laboratory of Solid State Microstructures | Zhang R.,Nanjing National Laboratory of Solid State Microstructures | Xiu X.Q.,Nanjing National Laboratory of Solid State Microstructures | And 2 more authors.
Journal of Crystal Growth | Year: 2010

We have grown Fe3N films on GaN(0 0 0 2) substrates by metalorganic chemical vapor deposition (MOCVD). Under lower growth temperatures, small iron particles were formed on GaN surface, while under higher growth temperatures, Fe3N films were formed. The surface morphology of samples with different growth temperatures were characterized by atomic force microscopy. In X-ray Photoelectron Spectroscopy (XPS) measurement, the coexistence of metallic Fe and Fe2+ or Fe3+ was observed in the sample grown at 600 °C, while the sample grown at 1050 °C showed only high valence forms of Fe ions. It was also found that the magnetic moments of Fe3N prefer to align normal to the c-axis. © 2009 Elsevier B.V. All rights reserved. Source


Yan W.S.,Nanjing National Laboratory of Solid State Microstructures | Zhang R.,Nanjing National Laboratory of Solid State Microstructures | Xie Z.L.,Nanjing National Laboratory of Solid State Microstructures | Xiu X.Q.,Nanjing National Laboratory of Solid State Microstructures | And 2 more authors.
Materials Letters | Year: 2010

The LiNbO3 thin films are successfully grown by pulsed-laser deposition on theAl0.28Ga0.72N/GaN substrate. The films are characterized by the X-ray diffraction and the X-ray photoelectron spectroscopy. The ferroelectric properties are measured by the piezoresponse force microscopy. An Al/SiO2/LiNbO3/Al0.28Ga0.72N/GaN structure is then fabricated and measured by high frequency capacitance-voltage at 1 MHz. The mechanism of interaction between interfaces is revealed. © 2009 Elsevier B.V. All rights reserved. Source

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