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Crystal growth and characterization of Pr2−xCexCuO4

✍ Scribed by M. Matsuda; Y. Endoh; Y. Hidaka

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
760 KB
Volume
179
Category
Article
ISSN
0921-4534

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✦ Synopsis

Single crystals of Pr2_,CexCuO4 were grown using the Cue flux method. Large crystals in which the Ce distribution was homogeneous were grown over a wide range of Ce concentrations. Typical Pr2CuO, and Prt.a6Ceo.14CuO4 single crystals are of 500 × 3 mm 3 and 10X 10X0.1 mm 3, respectively. A small but high quality reduced Pr~.s4Ceo.t6CuO,, crystals show superconductivity with a T¢ of 18 K and a transition width of 1.5 K. We have examined the effects of Pt contamination from the Pt crucible. Only a 1% substitution of Pt for Cu eliminates the superconductivity entirely. Pt suppresses T¢ more quickly in the Pr2_xCe.~CuO4 system than in the La2_~SrxCuO4 system, where a Pt substitution of 2% eliminates the superconductivity.

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Single crystal growth of Nd2−xCexCuO4−y
Single crystal growth of Nd2−xCexCuO4−y
✍ L. Zhang; J.Z. Liu; M.D. Lan; P. Klavins; R.N. Shelton 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 616 KB

ystals of the N-type superconducting Nd2\_~CexCuO4\_~. system have been grown by a self-flux technique. In this method, excess Ce is required to obtain single crystals with optimal superconducting properties. Crystals grown by this technique show superconducting transition temperatures with onsets o