Nanjundaswamy, K. S. ; Lewicki, A. ; Kakol, Z. ; Gopalan, P. ; Metcalf, P. ; Honig, J. M. ; Rao, C. N. R. ; Spalek, J. (1990) Magnetic properties of pure, Sr- and Ca-doped La2NiO4+δ ceramics: onset of high-Tc superconductivity Physica C: Superconductivity, 166 (3-4). pp. 361-371. ISSN 0921-4534
Full text not available from this repository.
Official URL: http://linkinghub.elsevier.com/retrieve/pii/092145...
Related URL: http://dx.doi.org/10.1016/0921-4534(90)90417-D
Abstract
We present the results for the temperature and field dependence of the magnetic for ceramic materials of the composition La2−xMxNiO4, with M=Sr or Ca and 0≤x≤0.4. The onset of a strong diamagnetism has been observed at temperatures between 8 and 70 K, depending on sample composition, annealing conditions. and thermal cycling procedures. The results are similar to those obtained earlier for monocrystalline samples and are likewise interpreted as due to the onset of superconductivity in a minority phase. A comparison with the results for superconducting La1.8Sr0.2Cu0.9Ni0.1O4 ceramics is also made; this illustrates some unique features of the nickelate systems, such as the high values of the critical fields Hc1 and Hc2. The differences between monocrystalline and ceramic systems are also discussed.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 41955 |
| Deposited On: | 31 May 2011 14:04 |
| Last Modified: | 31 May 2011 14:04 |
Repository Staff Only: item control page
