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 |
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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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