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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/673

Title: 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
Authors: SUNDARESAN, A
GHOSH, K
RAMAKRISHNAN, S
GUPTA, LC
CHANDRA, G
SHARON, M
VIJAYARAGHAVAN, R
Issue Date: 1994
Publisher: AMERICAN PHYSICAL SOC
Citation: PHYSICAL REVIEW B,49(9)6388-6391
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 TISr2GdCu2O7 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 (T(c) = 60 K) and antiferromagnetic ordering (T(N) = 1.8 K) coexist in TlSr2Ca0.4Gd0.6CU2O7. The low value of the effective magnetic moment (2.9 mu(B)) of Yb along with the lattice constant anomaly suggest that Yb ions are in a mixed valence state in TlSr2YbCu2O7.
URI: http://dx.doi.org/10.1103/PhysRevB.49.6388
http://dspace.library.iitb.ac.in/xmlui/handle/10054/13089
http://hdl.handle.net/100/673
ISSN: 0163-1829
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