الفهرس | Only 14 pages are availabe for public view |
Abstract This study focused on the impact of the proportion of Y / Ba obtain materials in the superconductive order to achieve this purpose the sequence of work in this letter is as follows: - 1 - The preparation of composite samples in the form of Ba Cu O 2 - were studied crystal structure of the vehicles by X-ray diffraction 3 - samples were tested by measuring the electrical resistance function in temperature over the 77-300 K. |