Direct observation of Cu spin moments by the nuclear heat capacity in La2−xMxCuO4 (M=Sr and Ba)

✍ Scribed by Nobuo Wada; Shigeru Ohsawa; Yuki Nakamura; Ken-ichi Kumagai

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 336 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80258-5

✦ Synopsis

Magnitudes S of Cu magnetic spins in La-systems were directly observed as a function of the Srand Ba-concentrations x by measuring 63/65Cu nuclear heat capacity. The results show Cu magnetic spins in the superconductors of the both systems. In the La-Ba system, S becomes large just at the concentration where the x dependence of the superconducting transition temperature Tc shows a drop of T c, which suggests a correlation of S with T c.