Bandyopadhyay, A. K. ; Varandani, Deepak ; Gmelin, E. ; Narlikar, A. V. (1994) Resistivity, magnetic-susceptibility, and specific-heat studies of ErBa2(Cu(1−x)Mx)3O7−y [(M=Ni, Zn, Fe, Co, and Ga) and x=0.005]: the effect of site-dependent substitutional disorder Physical Review B: Condensed Matter and Materials Physics, 50 (1). pp. 462-469. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v50/i1/p462_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.50.462
Abstract
We report here a systematic study of the resistivity, ac magnetic susceptibility, and specific-heat (Cp) anomalies in Er-1-2-3 systems for both the pure phase and when Cu is partly (0.5%) replaced by Ni, Zn, Fe, Co, and Ga. These substitutions are aimed at studying the role of site-dependent in-plane and out-of-plane disorder, in conjunction with fluctuation effects. Analysis of the results shows that, as compared to in-plane, the out-of-plane substitutions exhibit a domination of the fluctuation effect. This has been explained from the fact that the out-of-plane disorder substantially decouples the interlayer links between CuO2 planes across the adjoining unit cells. This transforms the system to be more two dimensional, thereby enhancing the contribution of fluctuations.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 32913 |
| Deposited On: | 25 Jun 2011 13:57 |
| Last Modified: | 25 Jun 2011 13:57 |
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