True Tolerance Factor Effects in Ln3+1.85M2+0.15CuO4 Superconductors

✍ Scribed by J.A. McAllister; S. Davies; J.P. Attfield

• Book ID: 102608678
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 137 KB
• Volume: 155
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8914

✦ Synopsis

A series of seven Ln 3؉ 1.85 M 2؉ 0.15 CuO 4 samples has been prepared in which mixtures of Ln ‫؍‬ La and Nd and M ‫؍‬ Ca, Sr, and Ba are used to increase the average radius from 1.180 to 1.223 A > (equivalent to an increase of tolerance factor from 0.856 to 0.871) while the size variance is 5xed at a constant value of 2 ‫؍‬ 0.0020 A s 2 . X-ray powder di4raction is used to study structural changes, and ac magnetic susceptibility, electrical resistivity, and thermoelectric power measurements show the variation of physical properties as a true function of the tolerance factor.