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Phase equilibria in La(Y)-Ba-Cu-O systems and growth of high-T c superconductor bulk single crystals

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8 Author(s)
Emel'chenko, G.A. ; Inst. of Solid State Phys., Acad. of Sci., Chernogolovka, USSR ; Abrosimov, N.V. ; Bazhenov , A.V. ; Masalov, V.M.
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The isobaric phase diagrams of BaO(La2O3)-CuO-CuO0.5 systems at a partial oxygen pressure of 0.021 MPa and the phase transition BaO2 &rlarr2;BaO at oxygen pressure up to 2.1 MPa were studied. A flux method for growing bulk single crystals of YBa2Cu3O7-δ, La2CuO 4, (LaSr)2CuO4, Nd2CuO4 , and (NdCe)2CuO4 has been developed using a rotatable crucible which ensures separation of crystals from the melt. The effects of temperature, oxygen pressure, and heat-treatment duration on the superconducting characteristics of the crystals were studied

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Magnetics, IEEE Transactions on  (Volume:27 ,  Issue: 2 )