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[en] Magnetization measurements on a Pr1.85Ce0.15CuO4-y single crystal (Tc = 19.2 K) have provided evidence of strong field-induced diamagnetic fluctuations near the superconducting transition; the critical zone represents an important fraction (> 33%) of the reversible diamagnetic regime, at any field above 0.05 T. The high-field magnetization displays scaling behaviour and the observed scaling functions are in excellent agreement with the predictions for 2D superconducting systems. (orig.)
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