Calorimetric study on thermodynamic stability of La2−xMxM′Cu2Oy (M, M′Sr, Ca) solid solution

作者: Yasushi Idemoto , Yooko Yasuda , Kazuo Fueki

DOI: 10.1016/0921-4534(94)02377-8

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摘要: Abstract The standard enthalpy of formation Δ f H 0 , La 2− x M M′Cu 2 O y (M, M′Sr, Ca) solid solution was determined by the calorimetric method. change reaction ΔH LSSCO and LCCCO from simple oxides, were calculated as a function . exhibited remarkable dependence on whereas its LSCCO small. A correlation found between heat − copper valence. These findings interpreted in terms preference Sr Ca to 2a sites.

参考文章(16)
H.B. Liu, D.E. Morris, A.P.B. Sinha, X.X. Tang, Superconductivity in La2−xSrxCaCu2O6 at 60 K Physica C: Superconductivity. ,vol. 174, pp. 28- 32 ,(1991) , 10.1016/0921-4534(91)90417-W
Kyoichi Kinoshita, Hiroyuki Shibata, Tomoaki Yamada, Crystal structure and superconducting properties of La1.85Ca1.15Cu2O6+δ Physica C: Superconductivity. ,vol. 176, pp. 433- 440 ,(1991) , 10.1016/0921-4534(91)90046-2
Seiji Adachi, Takeshi Sakurai, Yuji Yaegashi, Nobuaki Seiji, Atsushi Fukuoka, H Yamauchi, None, Increase of the Meissner volume fraction in O2-HIP processed La1.85Ca1.15Cu2O6 samples Physica C-superconductivity and Its Applications. ,vol. 206, pp. 329- 334 ,(1993) , 10.1016/0921-4534(93)90532-U
G.H. Kwei, J.O. Willis, T. Sakurai, J.A. Goldstone, A.C. Lawson, H. Yamauchi, S. Tanaka, Dopant solubility, phase stability and superconductivity in Sr-doped La2−xSrxCaCu2O6 Physica C-superconductivity and Its Applications. ,vol. 213, pp. 455- 470 ,(1993) , 10.1016/0921-4534(93)90466-4
R. J. Cava, B. Batlogg, R. B. van Dover, J. J. Krajewski, J. V. Waszczak, R. M. Fleming, W. F. Peck, L. W. Rupp, P. Marsh, A. C. W. P. James, L. F. Schneemeyer, Superconductivity at 60 K in La2-xSrxCaCu2O6: the simplest double-layer cuprate Nature. ,vol. 345, pp. 602- 604 ,(1990) , 10.1038/345602A0
Takashi Nishikawa, Shin-ichi Shamoto, Masafumi Sera, Masatoshi Sato, Shigeki Ohsugi, Yoshio Kitaoka, Kunisuke Asayama, Hole density dependence of the low temperature electronic specific heat coefficient of La2-xSrxCaCu2O6 with weakly localized electrons Physica C-superconductivity and Its Applications. ,vol. 209, pp. 553- 558 ,(1993) , 10.1016/0921-4534(93)90574-A
Monica Ferraris, Marco Braglia, Rosaria Chiappetta, Eros Modone, Giuseppe Cocito, Different processes for the preparation of fluorozirconate glasses Materials Research Bulletin. ,vol. 25, pp. 891- 897 ,(1990) , 10.1016/0025-5408(90)90067-C
Yasushi Idemoto, Kazuo Fueki, Toshihiro Shinbo, T-log PO2 diagram and copper valence of Nd1.85Ce0.15CuO4−δ Physica C-superconductivity and Its Applications. ,vol. 166, pp. 513- 517 ,(1990) , 10.1016/0921-4534(90)90052-G
Yasushi Idemoto, Jun Takahashi, Kazuo Fueki, Standard enthalpies of formation of member oxides in the Bi-Sr-Ca-Cu-O system Physica C-superconductivity and Its Applications. ,vol. 194, pp. 177- 186 ,(1992) , 10.1016/0921-4534(92)90689-A
Yasushi Idemoto, Kazuo Fueki, Oxygen nonstoichiometry and high temperature conductivity of the 2201 phase of the BiSrCuO superconducting oxide Physica C-superconductivity and Its Applications. ,vol. 190, pp. 502- 510 ,(1992) , 10.1016/0921-4534(92)90712-L