Journal ArticleDOI
Effect of 3d metal ion (Fe, Ni, Zn) substitution in REBa2(Cu3−xMx)O7 (RE=Sm, Dy)
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TLDR
In this article, the authors carried out a study on SmBa2(Cu3−xMx)O7 and DyBa2 (Cu3+xmxO7) O7 (M=Fe, Ni, Zn) to determine the solubility limit and Tc suppression rate.Abstract:
The present study is aimed at carrying out studies on SmBa2(Cu3−xMx)O7 and DyBa2(Cu3−xMx)O7 (M=Fe, Ni, Zn) in order to determine the solubility limit and the Tc suppression rate. Interestingly, the solubility limit is higher for M = Zn in both the Sm and Dy — 123 systems in contrast to the Y — 123 system. Resistivity (ϱ-T) and susceptibility (χ-T) studies indicate that the initial rate of Tc suppression (upto ∼3 atom% of the dopant concentration) in both the systems lies in between that of Nd-123 and Y-123 systems.read more
References
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Journal ArticleDOI
Tight-binding potentials for transition metals and alloys.
Fabrizio Cleri,Vittorio Rosato +1 more
TL;DR: The parameters of many-body potentials for fcc and hcp transition metals, based on the second-moment approximation of a tight-binding Hamiltonian, have been systematically evaluated and good quantitative agreement with the experimental data up to temperatures close to the melting point is found.
Journal ArticleDOI
Influence of Ni, Fe, and Zn substitution on the superconducting and antiferromagnetic state of YBa2Cu3O7- delta.
TL;DR: The concentration dependence of the Pauli susceptibility and the electrical conductivity indicates that the shift of the Fermi energy towards the mobility edge with increasing degree of substitution is one important mechanism for the suppression of the superconducting transition temperature.
Journal ArticleDOI
Influence of Cu-site substitution on the structure and superconducting properties of the NdBa2Cu3-xMxO7+ delta (M=Fe,Co) and NdBa2Cu3-xMxO7- delta (M=Ni,Zn) systems.
TL;DR: Compared to the YBa 2 Cu 3-x M x O 7+δ (M=Fe, Co, Ni, Zn) system, considerably high solid solubility and drastic T c suppression is achieved in the Nd 1:2:3 system.
Journal ArticleDOI
Ion size effect on Tc in RBa2Cu3−χGaχO7−y systems (R=Er, Y, Dy, Eu and Nd)
Yunhui Xu,Weiyan Guan +1 more
TL;DR: In this article, the effect of Ga substitution for Cu in RBa2Cu3−χGaχO7−y (R=Er, Y, Dy, Eu and Nd) has been investigated for nominal composition χ=0, 0.05,0.1, 0.,15, 0,2 and 0.3, and at a constant Ga concentration, Tc decreases with increasing radius of the R ions.
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