TEM study of superconducting polycristalline diamond

DSpace Repository

TEM study of superconducting polycristalline diamond

Show full item record

Export reference to Mendeley 
Title: TEM study of superconducting polycristalline diamond
Author: Alegre, Maria de la Paz; Villar, Maria del Pilar; Araújo Gay, Daniel; Bustarret, Etienne; Caprón, T; Williams, O.A.
xmlui.dri2xhtml.METS-1.0.item-source: American Institute of Physics Conference proceedings 1292 (2010) 133-136
Abstract: Heavily Boron-doped MPCVD-grown (Microwave Plasma Chemical Vapour Deposition) polycrystalline diamond layers were observed to have a superconducting character depending exclusively on the growth time, i.e. grown under identical experimental conditions. To elucidate such behavior, morphology aspects are investigated using Transmission Electron Microscopy (TEM). Diffraction contrasts and High Angle Annular Dark Field (HAADF) observations show that grains are thicker and boron enrichment occur at grain boundary in the superconducting samples. Interfacial effects are the main difference between the two samples, in the nonsuperconducting ones descohesion effect is observed. In both samples boron concentration is nearly constant except in isolated grains and twins, where their crystal orientation probably influences boron incorporation during growth. In summary, as grain configuration changes along the growth, a threshold thickness should be over passed to allow an optimum transport between the diamond grains.
Subject: Superconductivity ; polycristalline diamond ; TEM ; Z-Contrasts.
Handle: http://hdl.handle.net/10498/17162
Date: 2010-01-01

Files in this item

Files Size Format View Description
TEM study of s ... olycrystalline diamond.pdf 12.13Mb PDF View/Open Pubicacion

Statistics

View statistics

This item appears in the following Collection(s)

Show full item record