Sundaresan, A. ; Ghosh, K. ; Ramakrishnan, S. ; Gupta, L. C. ; Chandra, Girish ; Sharon, M. ; Vijayaraghavan, R. (1994) Magnetic and superconducting properties of TlSr2Ca1−xRxCu2O7 [R=Gd (x=0.6,1.0); Ho,Yb (x=1.0)]: high TN(=3.1 K) in a Gd system Physical Review B: Condensed Matter and Materials Physics, 49 (9). pp. 6388-6391. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v49/i9/p6388_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.49.6388
Abstract
Magnetic and superconducting properties of single-Tl-O-layered TlSr2Ca1−xRxCu2O7 [R=Gd (x=0.6,1.0);Ho,Yb (x=1.0)] have been studied. The antiferromagnetic ordering temperature of Gd moments in nonsuperconducting TlSr2GdCu2O7 is 3.1 K, which is the highest among the corresponding nonsuperconducting parent cuprates. The materials based on Ho and Yb do not order magnetically down to 1.5 K. Superconductivity (Tc=60 K) and antiferromagnetic ordering (TN=1.8 K) coexist in TlSr2Ca0.4Gd0.6Cu2O7. The low value of the effective magnetic moment (2.9µB) of Yb along with the lattice constant anomaly suggest that Yb ions are in a mixed valence state in TlSr2YbCu2O7.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 40895 |
| Deposited On: | 25 May 2011 11:36 |
| Last Modified: | 25 May 2011 11:36 |
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