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Effect of Fe doping on gaps in GdBa2Cu3O7−δ

✍ Scribed by A.I. Akimenko; V.A. Gudimenko

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
423 KB
Volume
223
Category
Article
ISSN
0921-4534

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✦ Synopsis

The effect of Fe doping on the gap suppression has been investigated by the point-contact spectroscopy method for two kinds of GdBa2 (Cut _xFex)307-a specimens (x = 0.03, 0.06, 0.09, 0.12 ). Only in the case of Fe ion duster formation in chains, largegap (.4~u) suppression has been observed, and the rate of the zf~ decrease is almost the same as was found in the Zn doped YBa2Cu3OT_6 samples. The more homogeneous distribution of Fe in the chains leads to gapless superconductivity at x> 0.06.

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Crystal structure, Tc, magnetic properti
Crystal structure, Tc, magnetic properties and Mössbauer spectrum of Fe-doped GdBa2Cu3O7−δ
✍ S.T. Lin; C.L. Lin; K.C. Lin; C. Tien; I.M. Jiang 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 492 KB

A series of superconductors GdBa2Cu3\_xFexO7\_, have been prepared to study the effect of the substitution of Fe for Cu on the crystal structure, T c and magnetic properties. For x~ 0.07, the substitution of Fe for Cu increases the lattice parameter a, but decreases the lattice parameter b; for x >