Observation of static magnetic moment on the copper site in superconducting La2−xSrxCuO4: The nuclear heat capacity measurement

✍ Scribed by Nobuo Wada; Hiroshi Muro-oka; Yuki Nakamura; Ken-ichi Kumagai

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 552 KB
• Volume: 157
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(89)90270-0

✦ Synopsis

The heat capacity of La2 _xSl'xCuO 4 for the Sr-concentrations 0 ~< x ~< 0.3 was measured in the wide temperature range between 60 K and 80 mIC A homogeneous bulk superconducting transition was characterized by a steep jump of the heat capacity at To, AC/Tc = 13 mJ/K2/mol for x= 0.15. The low temperature heat capacity below ~ 0.5 K. shows nuclear Schottky anomaly due to the 63/65Cu nuclei, from which we obtained the Sr-eoncentration dependence of the hyperfine field on the 63/6~Cu nuclei. The result shows the static magnetic order of the Cu-moments in the oxide superconducting La-system.