Effects of oxygen deficiency and substitution for copper in Nd2-xCexCuO4-δ

✍ Scribed by Yoji Koike; Akihiro Kakimoto; Masaru Yoshida; Hiroyuki Inuzuka; Takashi Noji; Yoshitami Saito

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 370 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80418-3

✦ Synopsis

~ffects of oxygen deficiency on the superconductivity in Nd 2 _ Ce CU04_~have been systematically Investigated. The value of T strongly depends on x and &. Ove~-reduction is found to decrease T e because of randomness and/8r over-doping of carriers. Effects of partial substitution of Ni. Zn and Ga for Cu have been also studied. The Ni substitution markedly decreases T , while the Ga substitution does not. This is discussed relating to the antiferromagnetic phase fransition in samples with smaller x.