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Microstructures of sputtered oriented Si/CeO bilayers for YBaCuO/Si integrated microelectronics

International Journal of Modern Physics B, ISSN: 0217-9792, Vol: 17, Issue: 4-6 II, Page: 848-854
2003
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Conference Paper Description

In the framework of a research aimed to superconductor/semiconductor integrated electronics, we have grown a-axis oriented YBaCUO (YBCO) thin films on silicon (100) substrates with (111) oriented insulating buffer layers of cerium dioxide (CeO), using magnetron sputtering deposition techniques. The properties of the cerium dioxide layer have been preliminary optimized by means of several layout and by monitoring the growing procedures through X-ray diffraction, AFM and TEM techniques. The lattice matching between CeO and YBCO resulted to be worsened by an amorphous thin SiO layer at the Si/CeO interface, that decouples the buffer orientation from the seed orientation. However, it was possible to grow a relatively thick, optimally textured layer of CeO without spurious orientations. The YBCO films deposited on top of this layer result preferentially aaxis oriented. The transition widths are very large, jet well controllable and reproducible. Some technological applications can be already envisaged.

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