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We investigated the generic phase diagram of the electron dopedsuperconductor, Nd2-xCexCuO4, using films prepared by metal organicdecomposition. After careful oxygen reduction treatment to remove interstitialOap atoms, we found that the Tc increases monotonically from 24 K to 29 K withdecreasing x from 0.15 to 0.00, demonstrating a quite different phase diagramfrom the previous bulk one. The implication of our results is discussed on thebasis of tremendous influence of Oap "impurities" on superconductivity and alsomagnetism in T' cuprates. Then we conclude that our result represents thegeneric phase diagram for oxygen-stoichiometric Nd2-xCexCuO4.

Generic phase diagram of "electron-doped" T' cuprates