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Stoichiometry of bulk superconducting La2CuO4+δ: A superconducting superoxide?

✍ Scribed by J.E. Schirber; B. Morosin; R.M. Merrill; P.F. Hlava; E.L. Venturini; J.F. Kwak; P.J. Nigrey; R.J. Baughman; D.S. Ginley

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
237 KB
Volume
152
Category
Article
ISSN
0921-4534

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✦ Synopsis

A variety of analytical tools have been combined to show that bulk superconducting La2CuO4+~ has a La to Cu ratio of 2.00 ( + 0.02 ) and an oxgen stoichiometry of 4.13 ( + 0.1 ). The combination of these analytical results and magnetization data with a model leads us to suggest that the excess charged oxygen is introduced as O~-.

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Anisotropic transport properties of supe
Anisotropic transport properties of superconducting La2CuO4+δ single crystal
✍ Hideaki Kitazawa; Koichi Katsumata 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 178 KB

Single crystals of antiferromagnetic La2CuO4+ b (TN=250K) which show superconductivity ( Tc=32K ) with the Mcissner fraction of 9.1% were grown from a melt with excess of CuO. The electrical resistivity and the Hall effect have been measured on the as-grown and heat-treated samples under high magnet